History UsefulNotes / CorrectiveLenses

30th Jan '16 9:47:27 PM billybobfred
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Despite popular misconceptions, wearing glasses or contacts does not always equal better vision. A person with vision less adequate than 20/20 can't get just any pair of glasses and be good to go. He or she will have to see an optometrist, who will give them an eye exam to discern whether the person is nearsighted or farsighted and just how severely their vision is impaired. Then the person will get new glasses with lenses made based on their level of visual impairment (This also applies to contacts). The lenses are shaped in a certain way to refract light in such a way that the person with bad uncorrected vision will be able to have optimal vision as long as he or she has them on. We say "optimal" rather than "perfect" because some people have vision that is so bad that even ''with'' correction, they cannot attain 20/20 vision.

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Despite popular misconceptions, wearing glasses or contacts does not always equal better vision. A person with vision less adequate than 20/20 can't get just any pair of glasses and be good to go. He or she They will have to see an optometrist, who will give them an eye exam to discern whether the person is nearsighted or farsighted and just how severely their vision is impaired. Then the person will get new glasses with lenses made based on their level of visual impairment (This also applies to contacts). The lenses are shaped in a certain way to refract light in such a way that the person with bad uncorrected vision will be able to have optimal vision as long as he or she has they have them on. We say "optimal" rather than "perfect" because some people have vision that is so bad that even ''with'' correction, they cannot attain 20/20 vision.
26th Jan '15 11:07:56 AM maxwellsilver
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A pair or glasses or contacts can do wonders, but only for the person they were designed for. Because of the fact that a pair of corrective lenses refracts light to correct a certain ''type'' of bad vision, it is generally considered inadvisable to try on a pair that belongs to someone else. This is played for laughs in ''BigBangTheory'', when Priya makes Leonard wear contact lenses, resulting in him falling over stuff. In fact, unnecessarily wearing glasses with prescription lenses can even be harmful, as with Elton John, [[PurelyAestheticGlasses who wore glasses (that unfortunately had prescription lenses) in his youth because he thought they looked good]], but [[{{Irony}} years of wearing unnecessary corrective lenses ruined his eyes to the point where he actually]] ''[[{{Irony}} needs]]'' [[{{Irony}} real glasses]].

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A pair or glasses or contacts can do wonders, but only for the person they were designed for. Because of the fact that a pair of corrective lenses refracts light to correct a certain ''type'' of bad vision, it is generally considered inadvisable to try on a pair that belongs to someone else. This is played for laughs in ''BigBangTheory'', ''Series/TheBigBangTheory'', when Priya makes Leonard wear contact lenses, resulting in him falling over stuff. In fact, unnecessarily wearing glasses with prescription lenses can even be harmful, as with Elton John, [[PurelyAestheticGlasses who wore glasses (that unfortunately had prescription lenses) in his youth because he thought they looked good]], but [[{{Irony}} but years of wearing unnecessary corrective lenses ruined his eyes to the point where he actually]] ''[[{{Irony}} actually '' needs]]'' [[{{Irony}} real glasses]].
8th Jul '14 4:06:02 PM Antigone3
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Added DiffLines:

Modern cataract surgery involves replacing the now-opaque lens of the patient's eye with a prescription lens. But before the 1940s, a cataract patient would instead have their lens removed and get to wear special cataract glasses from then out. These glasses had extra-heavy magnifying lenses, to the point where if you'd only had one cataract removed the glasses wouldn't balance on your face. You also had no peripheral vision to speak of, because the focus point was dead-center on the eye. Given that most cataract patients are older, the old "'borrow' Grandma's glasses to fry ants" stunt may have involved grabbing her cataract glasses, instead of reading glasses or bifocals.
27th Sep '13 11:34:02 PM ohessess
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There are also large-framed plastic sunglasses made to fit over another pair of (prescription) glasses. It is a considerable understatement to say that these are not stylish or aesthetically pleasing, but may be more convenient for tasks like driving as they are easy to slip on and off quickly.

to:

There are also large-framed plastic sunglasses made to fit over another pair of (prescription) glasses. It is a considerable understatement to say that these are not stylish or aesthetically pleasing, but they may be more convenient for tasks like driving as they are easy to slip on and off quickly.



Contact lenses can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover; afterward, she will be shown to be much more attractive without glasses, and her life will improve accordingly. However, such media rarely bothers to portray either the rather involved cleaning ritual that contact-wearers have to go through, which is described below, or the process of getting accommodated to wearing contact lenses in the first place, which in comparison to that for glasses is both protracted and fraught with difficulty. (All of which, too, neatly sidesteps the fact that lots of folks find [[Meganekko glasses]] [[SexySpectacles appealing]] in their own right.)

to:

Contact lenses can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover; afterward, she will be shown to be much more attractive without glasses, and her life will improve accordingly. However, such media rarely bothers to portray either the rather involved cleaning ritual that contact-wearers have to go through, which is described below, or the process of getting accommodated to wearing contact lenses in the first place, which in comparison to that for glasses is both protracted and fraught with difficulty. (All of which, too, neatly sidesteps the fact that lots of folks find [[Meganekko glasses]] [[SexySpectacles appealing]] glasses appealing in their own right.)
27th Sep '13 11:30:12 PM ohessess
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Glasses have been the usual method of correcting bad vision for centuries and is generally the cheapest way to do this job. After having an eye exam to determine the severity of one's visual impairment, the person will then go to pick out a set of frames, after which a set of lenses will be made according to the frame and the kind of vision the person has. After putting on the new glasses, you usually feel like everything has greater clarity and like you can see everything.

Wearing glasses tends to make people see their world through a single frame of any shape. When the wearer's eyes send in their two images, the brain combines the two signals to create the stereoscopic vision; in the process the central edges of the frames seem to disappear unless the wearer moves their eyes to one side or the other. Both lenses have to be in the glasses for them to correct the wearer's vision to their fullest potential. If, say, one of the lenses pops out but not the other, the lens that is still in corrects that eye's vision, but since the other lens is gone, then the image sent in by the uncorrected eye will be combined with that sent by the corrected eye to form an image with greater clarity than an image seen by uncorrected eyes, but is not as clear as an image that a glasses wearer sees with both eyes corrected.

For any pair of glasses, it is relatively easy to take care of them. You just got to remember to put them aside when you sleep and not do stupid things that can cause them to scratch. Plus, while it is considered inadvisable and liable to cause scratching to the lens, you can clean them and wipe them with ''any'' method that can do the job, like licking the lenses and wiping them with your shirt, without any risk to your health. It is considered most proper to clean your glasses by rinsing the lenses to remove any particles that could scratch the lenses and then wiping them with a fresh cloth or paper towel; worn shirts have particles on them that could scratch the lenses. Those who are particularly conscientious about this will buy a special solution and cloth specifically for the purpose of cleaning their glasses.

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Glasses have been the usual method of correcting bad vision for centuries centuries, and is are generally the cheapest way to do this job. After having and most convenient method. First you have an eye exam exam, to determine the severity nature and extent of one's visual impairment, the person will then your uncorrected impairment; then, you might go to and pick out a set of frames from the available options (usually displayed on racks along the walls of an optometrist's office), or maybe keep the frames you've got already if this isn't your first pair of glasses and you liked the last one well enough; finally, once the proper lenses for your prescription and frame have been manufactured, you'll come back to the optometrist and get them adjusted for proper fit. If you've never worn glasses before, but really needed them, this is the point at which you experience a brief epiphany on the subject of "holy crap so that's what things actually look like".

Your optometrist will concern himself with the quality of your lenses, but he probably won't stop you from picking a lousy set of frames; he is selling them, after all. It's a bit oversimplifying things to say that quality and durability are inversely proportional to price and the presence of designer labels, but the rule serves a useful purpose nonetheless; while there is a certain undeniable appeal to a pair of rimless gunmetal-gray frames made of space-age composites that masses a quarter of a gram and looks like something Steve Jobs would've worn, keep in mind that this is something you are going to be wearing on your face for more or less all of the time you spend awake, and that, unless you lead an extremely sedentary lifestyle and basically never exert yourself at all, sturdiness is at least occasionally going to be a quality you'll need your glasses to exhibit. Rimless glasses in particular have trouble with durability, because the complete lack of rims puts much more stress on the lens material and consequently tends to shorten its useful life; if that's where your interests lie, consider "rimway"
frames, which compromise with an arch around the upper half of the lens to bear stresses which would otherwise impact the lens itself, but leave the lower edge bare.

Sometimes people who don't wear glasses wonder whether people who do wear glasses are annoyed by having the frames around the edges of their visual field. The answer is "no, not really";
after which you've worn glasses for a set while, you don't really notice the frames, any more than you notice your nose. Depending on the shape and size of the frames, your glasses will do more or less to correct your peripheral vision, but even in the best case, the lenses will be made according to refract light coming in through the frame and edges; this doesn't help, but eventually you work out the kind of vision the person has. After putting on the new glasses, you usually feel like everything has greater clarity and like degree to which you can see everything.

Wearing glasses tends to make people see their world through a single frame of any shape. When
(and can't) trust what you perceive around the wearer's eyes send in their two images, the brain combines the two signals to create the stereoscopic vision; in the process the central edges of the frames seem to disappear unless the wearer moves their eyes to one side or the other. Both lenses have to be in the visual field.

Your
glasses for them to correct the wearer's vision to their fullest potential. If, say, have one of the lenses pops out but not the other, the lens that per eye for a reason. If you lose one, your brain, which is still in corrects that eye's vision, but since the other lens is gone, then the expecting to combine two corrected images into one relatively continuous visual field, instead receives a corrected image sent in by the from one eye, and an uncorrected eye will be combined with that sent by the corrected eye to form an image with greater clarity than from the other. If your prescription is modest, this probably won't be too much of a problem; if you're at 20/80 or higher, you're likely to have an image seen by uncorrected eyes, but is not as clear as an image that a easier time navigating the world if you just take your glasses wearer sees with both eyes corrected.

For any
off entirely until you can get the lens replaced; the alternative is to squint a lot and develop a crushing headache. (This is but one of many reasons why most glasses wearers keep a spare pair of glasses, it is relatively easy somewhere reasonably handy.)

Glasses aren't that hard
to take care of, especially newer ones. Older lenses made of them. You just got soft soda-lime glass will with relative ease pick up scratches deep enough to remember to put them aside when you sleep and not do stupid things that can cause them to scratch. Plus, substantially impair their clarity, while it modern lenses are quite tough by comparison -- plastic lenses are almost certainly either CR-39 resin, which originated as a material for casting B-17 fuel tanks, or polycarbonate, which is considered inadvisable used in bulletproof "glass"; glass lenses are almost certainly borosilicate, found in labs around the world as "Pyrex" and liable to cause scratching to the lens, you can myriad other trade names, and favored there over ordinary soda-lime glass for its improved thermal stability and hardness. These are not delicate materials; while, ideally, you'd clean them and wipe them with ''any'' method that can do the job, like licking the lenses with Windex-type spray and wiping a soft microfiber or chamois cloth kept expressly for the purpose, in practice you're just as likely to yank them off your face, scrub at them with your shirt, without any risk to your health. It is considered most proper to clean your glasses by rinsing the lenses to remove any particles that could scratch the lenses shirt tail, and then wiping stick them with a fresh cloth or paper towel; worn shirts have particles on them that could scratch the lenses. Those who back on, no harm done. Frames are particularly conscientious even easier; about this will buy a special solution and cloth specifically for the purpose all that's really required there is to take them off before you go to sleep, so you don't wake up to find yourself lying on top of cleaning their glasses.
uselessly twisted remains.



Multifocals are most often used to correct presbyopia. Earlier versions of this technology had visible lines in the lenses; aside from producing areas of abrupt focal change (which could be disorienting to the wearer), the lines themselves were a visible marker of the wearer's age. Modern lenses, including contact lenses, lack the abrupt transitions and the tell-tale lines.

Unlike regular glasses, which only have lenses in a simple convex or concave shape to correct either hyperopia or myopia, multifocals combine the corrective elements of convex and concave shapes in the same lens, but in different areas. A common design for a bifocal lens is a concave lens for seeing at distances with a convex area for reading. Trifocals will have another area for seeing at arm's distance. Because multifocal lenses provide different kinds of vision correction based on which area of the lens the wearer is looking through, the wearer will have to work out getting used to looking through a certain area of their glasses according to what they're doing. This is really difficult at first, especially after years of taking it for granted that you could look in any direction and also have vision good enough for looking at whatever you want to see.

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Multifocals are most often used to correct presbyopia. Earlier versions of this technology had visible lines in the lenses; aside from producing areas of abrupt focal change (which could be disorienting to the wearer), the lines themselves were a visible marker of the wearer's age. Modern lenses, including contact lenses, lack the abrupt transitions and Newer lenses can be made without the tell-tale lines.

lines; such lenses are known as "progressive bifocals" or just "progressive lenses", and have both benefits and drawbacks compared to the older style -- generally, progressive lenses are a little more comfortable and useful once you've become familiar with them, but standard bifocals make for a somewhat easier transition from standard single-focus lenses, because the areas of differing focus are sharply delineated and easy to distinguish.

Unlike regular glasses, which only have lenses in a simple convex or concave shape to correct either hyperopia or myopia, multifocals combine the corrective elements of convex and concave shapes in the same lens, but in different areas. A common design for a bifocal lens is a concave lens for seeing at distances with a convex area for reading. Trifocals will have another area for seeing at arm's distance. Because multifocal lenses provide different kinds of vision correction based on which area of the lens the wearer is looking through, the wearer will have to work out getting used to looking through a certain area of their glasses according to what they're doing. This is really difficult at first, especially after years of taking it for granted that you could look in any direction and also have vision good enough for looking at whatever you want to see.
see; on the other hand, as with most things, using multifocals gets easier with practice, and if you need them but don't use them then your vision will actually get worse, faster, than if you do.



People with all kinds of vision can wear sunglasses, a pair of glasses with lenses that are tinted to filter UV rays and protect the eyes. Obviously, off-the-rack sunglasses are generally cheaper because they can be mass-produced without taking vision correction needs into account. Someone who has these needs but doesn't wear contact lenses ''can'' get a pair of sunglasses made that can also correct vision, but these are pretty expensive. Therefore, some people who wear glasses will choose to get Transitions lenses that can darken when the light gets brighter. For a period of time beginning around 30 to 40 years ago and lasting about a decade, a solution for people who needed both corrective glasses and sunglasses involved a pair of thin plastic shaded "lenses" resembling the older ''pince-nez'' which could be attached to regular glasses. Often the small plastic clip that attached these to the central glasses frame was also hinged, so that the sunshades could be flipped up when indoors instead of being totally removed. As Transitional lens technology improved, these fell out of favour. YMMV as to whether these look endearingly dorky or not. Another version leaves off the clip, but adds tiny magnets to the outside "corners" of the sunglass frame and matching metal studs to the eyeglass frame. You can't flip these up when not in use, but they 1) stay put a little better than clip-ons and 2) don't risk scratching the wearer's prescription lenses. For people with prescription glasses, there are also large framed sunglasses to designed fit over another pair of glasses. They are not always the most aesthetically pleasing, but may be more convenient for tasks like driving as they are easy to slip on and off quickly. Interestingly, the "shaded clip-ons" have started to make a comeback for a specific application: 3D glasses for 3D movies in a theater or on a passive-3D TV set. Aviator sunglasses have large curved lenses designed to provide protection from light while reducing the wearer's field of vision as little as possible. Association with pilots and other people engaged in active pursuits contributed to their fashion cache, and they enjoyed a particular boom in popularity during the 1970s and early 80s.

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People with all kinds of vision can wear sunglasses, a pair of glasses with lenses that are tinted to filter UV rays and protect the eyes. Obviously, off-the-rack sunglasses are generally cheaper because they can be mass-produced without taking vision correction needs into account. Someone who has these needs but doesn't wear account, and a contact lenses ''can'' get a pair lens wearer can of course wear any style of sunglasses made that can also correct vision, she pleases, without compatibility concerns.

Prescription sunglasses are available; they're essentially the same as ordinary glasses,
but these are pretty expensive. Therefore, some people who wear with an added permanent tint applied to the lenses. These cost the same as an ordinary pair of glasses will choose to get Transitions lenses that can darken or a little more, though, and are strictly special-purpose wear; a popular alternative is the use of "Transitions" lenses, which tint dark brown when placed in direct sunlight, and return to transparency once removed. These make effective automatic sunglasses, but ''only'' in direct sunlight; the photochromic coating responds to ultraviolet light, which renders it of strictly limited use if the light gets brighter. falling on your eyes has already passed through UV-filtering glass, such as that from which all modern vehicle windshields are made.

For a period of time beginning around 30 to 40 years ago and lasting about a decade, a solution for people who needed both corrective glasses and sunglasses involved a pair of thin plastic shaded "lenses" resembling the older ''pince-nez'' which could be attached to regular glasses. Often the small plastic clip that attached these to the central glasses frame was also hinged, so that the sunshades could be flipped up when indoors instead of being totally removed. As Transitional lens technology improved, these fell out of favour. YMMV as favour; they are still manufactured, and occasionally found available for sale, but almost never used. (Interestingly, the "shaded clip-ons" have started to whether these look endearingly dorky make a comeback for a specific application: 3D glasses for 3D movies in a theater or not. on a passive-3D TV set.)

Another version leaves off the clip, but adds tiny magnets to the outside "corners" of the sunglass frame and matching metal studs to the eyeglass frame. You can't flip these up when not in use, but they 1) stay put a little better than clip-ons clip-ons, and 2) they don't risk scratching the wearer's prescription lenses. For people On the other hand, unlike clip-ons, they're also designed to mate specifically with prescription glasses, there a single model of frame and no others, and are considerably more expensive and less disposable.

There
are also large framed large-framed plastic sunglasses made to designed fit over another pair of (prescription) glasses. They It is a considerable understatement to say that these are not always the most stylish or aesthetically pleasing, but may be more convenient for tasks like driving as they are easy to slip on and off quickly. Interestingly, the "shaded clip-ons" have started to make a comeback for a specific application: 3D glasses for 3D movies in a theater or on a passive-3D TV set. Aviator sunglasses have large curved lenses designed to provide protection from light while reducing the wearer's field of vision as little as possible. Association with pilots and other people engaged in active pursuits contributed to their fashion cache, and they enjoyed a particular boom in popularity during the 1970s and early 80s.
quickly.



People who don't like the way glasses look on them or else for more practical reasons, decide to wear contact lenses. As anyone who regularly wears contacts can tell you, contacts are more expensive than glasses. Contact lenses used to be made of glass or rigid plastic, shaped to fit onto one iris. Modern contacts are made of flexible and breathable plastic [[note]] there are no blood vessels in the cornea, it gets oxygen directly from the air. This was an problem with earlier contacts, these days even rigid lenses are "gas-permeable"[[/note]]. Either type can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover, if they have one of these. After the makeover, she will be shown to be so much more attractive without glasses and her life will improve. However, we rarely see the cleaning ritual that contact-wearers have to go through, which is descibed below.

to:

People who don't like the way glasses look on them them, or else for more practical reasons, decide to wear contact lenses. As anyone who regularly wears contacts can tell you, contacts are more expensive than glasses. Contact lenses used to be made of glass or rigid plastic, shaped individually to fit onto one iris. Modern contacts the cornea of their wearers' eyes. This caused problems for early contact lens wearers, because the cornea lacks blood vessels and its cells are oxygenated by direct gas exchange with the surrounding air; older lens materials prevented this gas exchange with potentially unfortunate results, while modern contact lenses are made of flexible and from flexible, breathable plastic [[note]] there are no blood vessels in the cornea, it gets oxygen directly from the air. This was an problem with earlier contacts, these days even rigid which avoids this drawback.

Contact
lenses are "gas-permeable"[[/note]]. Either type can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover, if they have one of these. After the makeover, makeover; afterward, she will be shown to be so much more attractive without glasses glasses, and her life will improve. improve accordingly. However, we such media rarely see bothers to portray either the rather involved cleaning ritual that contact-wearers have to go through, which is descibed below.
described below, or the process of getting accommodated to wearing contact lenses in the first place, which in comparison to that for glasses is both protracted and fraught with difficulty. (All of which, too, neatly sidesteps the fact that lots of folks find [[Meganekko glasses]] [[SexySpectacles appealing]] in their own right.)



1. Wash and dry hands. 2. Open lens case. Identify lens. Clear lenses are nearly impossible to see, so most manufacturers tint them a very light blue. 3. Put a finger on the lens and it will cup to the finger. Water tension holds it on. Lift it out of the solution. 4. Carefully take lens with your other hand and rinse it with ''a commerically made and sterile'' solution. 5. Return lens to index or middle finger of dominant hand. With non-dominant hand, pull up eyelid to open eye. 6. Place lens in eye and blink to properly seat lens.

to:

1. Wash and dry hands. 2. Open lens case. Identify lens. Clear lenses are nearly impossible to see, so most manufacturers tint them a very light blue. 3. Put a finger on the lens and it will cup to the finger. Water tension holds it on. Lift it out of the solution. 4. Carefully take lens with your other hand and rinse it with ''a commerically commercially made and sterile'' solution. 5. Return lens to index or middle finger of dominant hand. With non-dominant hand, pull up eyelid to open eye. 6. Place lens in eye and blink to properly seat lens.
lens.

(If you're new to wearing contacts, you will need to repeat steps 4 through 6 in front of the bathroom mirror until you're ''absolutely sick of it''. Oh, and be careful how you blink! If you do it wrong, you'll dislodge the things, and have to start all over again. And it's really weird at first, having these thin slices of plastic stuck to your eyeballs, and you ''will'' want to blink them away, so as soon as you stop paying attention to not doing it...)



You've got to go through all that to protect your ocular health when wearing contacts. Tap water and saliva are considered inadvisable for cleaning and using these to clean one's contact lenses can put one at risk for an eye infection. In contrast, a glasses-wearer can take their glasses off, lick them, wipe them with their shirt, and put them back on without a problem (aside from stares from people who are Squicked out).

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You've got to go through all that to protect your ocular health when wearing contacts. Tap water and saliva are considered inadvisable for cleaning and using these to clean one's contact lenses can put one at risk for an eye infection. In contrast, a A glasses-wearer can take their glasses off, lick them, wipe them with their shirt, and put them back on without a problem (aside problem; this is because glasses' lenses aren't in direct contact with the eyeball, a trait contact lenses do not share. (It's even in the name!) Tap water and (especially) saliva are far from stares from people who are Squicked out).
sterile; your eyes produce tears precisely in order that occasional exposure to contaminants won't necessarily result in an eye infection, but tears can't get between your cornea and the lens which stays stuck to it for hours at a time, which makes a contaminated lens an excellent vector for infection.



Some people end up deciding to surgically correct their bad vision with Lasik, such as Music/WeirdAlYankovic, who wore glasses because of having vision that was ''especially'' bad. The surgery itself involves having to keep your eye open as a laser does its job while you are awake. Sometimes, the patient is given a mild sedative and anaesthetic eye drops before the procedure, but you're still awake with your eye open while a laserbeam is directly pointing right in your eye. Not to mention that the doctor has told you, with good reason, to not move your eye while the laser is doing its work. After the surgery, the patient is given a course of antibiotics and eye drops, as well as further instructions to reduce the risk of complications. Said complications include dry eye and damage to the cornea. Given these complications, fears that the procedure might blind them if something goes wrong, and the fact that Lasik is an elective surgery that is not required, some decide to play it safe and stick with glasses and contacts.

to:

Some people end up deciding to surgically correct their bad vision with Lasik, such as Music/WeirdAlYankovic, who wore glasses because of having vision that was ''especially'' bad. The surgery itself is relatively straightforward in a theoretical sense; the cornea is incised almost all the way around with a laser, then reattached with fine stitches so that its curvature more closely approximates the ideal spherical section. In practice, though, it involves having to keep your eye open as a laser does its job while you are awake. Sometimes, the patient is given a mild sedative and anaesthetic eye drops before the procedure, but you're still awake with your eye open while a laserbeam laser beam is directly pointing right in your eye. Not to mention that the doctor has told you, with good reason, to not move your eye while the laser is doing its work. work.

After the surgery, the patient is given a course of antibiotics and eye drops, as well as further instructions to reduce the risk of complications. Said complications include dry eye and damage to the cornea. Given these the potential for complications, fears that the procedure might blind them if something goes wrong, and the fact that Lasik is an elective surgery that is not required, some surgery, many people decide to play it safe and stick with glasses or contacts; while neither of those options approaches the convenience of just ''having good eyesight'', all but the most severe impairments can be corrected to an acceptable degree without needing to go to the extent of having your corneas lasered off and contacts.
sewn back on.



''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens that one would use to correct the vision of one eye and would squint to hold it in place. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''Literature/HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''Literature/ASeriesOfUnfortunateEvents''.

to:

''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. tight, and the addition of arms reaching back to hook over the wearer's ears makes modern glasses much more stable as well.

Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens lens, held in place by squinting, that one would use to correct the vision of one eye and would squint to hold it in place.eye. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''Literature/HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''Literature/ASeriesOfUnfortunateEvents''.
1st Aug '13 2:47:28 AM SeptimusHeap
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People who don't like the way glasses look on them or else for more practical reasons, decide to wear contact lenses. As anyone who regularly wears contacts can tell you, contacts are more expensive than glasses. Contact lenses used to be made of glass or rigid plastic, shaped to fit onto one iris. Modern contacts are made of flexible and breathable plastic [[hottip:*: there are no blood vessels in the cornea, it gets oxygen directly from the air. This was an problem with earlier contacts, these days even rigid lenses are "gas-permeable"]]. Either type can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover, if they have one of these. After the makeover, she will be shown to be so much more attractive without glasses and her life will improve. However, we rarely see the cleaning ritual that contact-wearers have to go through, which is descibed below.

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People who don't like the way glasses look on them or else for more practical reasons, decide to wear contact lenses. As anyone who regularly wears contacts can tell you, contacts are more expensive than glasses. Contact lenses used to be made of glass or rigid plastic, shaped to fit onto one iris. Modern contacts are made of flexible and breathable plastic [[hottip:*: [[note]] there are no blood vessels in the cornea, it gets oxygen directly from the air. This was an problem with earlier contacts, these days even rigid lenses are "gas-permeable"]]."gas-permeable"[[/note]]. Either type can be made to correct the wearer's vision, change the appearance of the wearer's eyes (changed color or monster/animal eyes), or both. It is common in media to have someone who wears glasses as part of their HollywoodHomely look ([[AlwaysFemale usually a girl or woman]]) switch to contacts as part of a makeover, if they have one of these. After the makeover, she will be shown to be so much more attractive without glasses and her life will improve. However, we rarely see the cleaning ritual that contact-wearers have to go through, which is descibed below.
12th Apr '13 5:24:28 PM StevieC
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People with all kinds of vision can wear sunglasses, a pair of glasses with lenses that are tinted to filter UV rays and protect the eyes. Obviously, off-the-rack sunglasses are generally cheaper because they can be mass-produced without taking vision correction needs into account. Someone who has these needs but doesn't wear contact lenses ''can'' get a pair of sunglasses made that can also correct vision, but these are pretty expensive. Therefore, some people who wear glasses will choose to get Transitions lenses that can darken when the light gets brighter. For a period of time beginning around 30 to 40 years ago and lasting about a decade, a solution for people who needed both corrective glasses and sunglasses involved a pair of thin plastic shaded "lenses" resembling the older ''pince-nez'' which could be attached to regular glasses. Often the small plastic clip that attached these to the central glasses frame was also hinged, so that the sunshades could be flipped up when indoors instead of being totally removed. As Transitional lens technology improved, these fell out of favour. YMMV as to whether these look endearingly dorky or not. Another version leaves off the clip, but adds tiny magnets to the outside "corners" of the sunglass frame and matching metal studs to the eyeglass frame. You can't flip these up when not in use, but they 1) stay put a little better than clip-ons and 2) don't risk scratching the wearer's prescription lenses. For people with prescription glasses, there are also large framed sunglasses to designed fit over another pair of glasses. They are not always the most aesthetically pleasing, but may be more convenient for tasks like driving as they are easy to slip on and off quickly. Aviator sunglasses have large curved lenses designed to provide protection from light while reducing the wearer's field of vision as little as possible. Association with pilots and other people engaged in active pursuits contributed to their fashion cache, and they enjoyed a particular boom in popularity during the 1970s and early 80s.

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People with all kinds of vision can wear sunglasses, a pair of glasses with lenses that are tinted to filter UV rays and protect the eyes. Obviously, off-the-rack sunglasses are generally cheaper because they can be mass-produced without taking vision correction needs into account. Someone who has these needs but doesn't wear contact lenses ''can'' get a pair of sunglasses made that can also correct vision, but these are pretty expensive. Therefore, some people who wear glasses will choose to get Transitions lenses that can darken when the light gets brighter. For a period of time beginning around 30 to 40 years ago and lasting about a decade, a solution for people who needed both corrective glasses and sunglasses involved a pair of thin plastic shaded "lenses" resembling the older ''pince-nez'' which could be attached to regular glasses. Often the small plastic clip that attached these to the central glasses frame was also hinged, so that the sunshades could be flipped up when indoors instead of being totally removed. As Transitional lens technology improved, these fell out of favour. YMMV as to whether these look endearingly dorky or not. Another version leaves off the clip, but adds tiny magnets to the outside "corners" of the sunglass frame and matching metal studs to the eyeglass frame. You can't flip these up when not in use, but they 1) stay put a little better than clip-ons and 2) don't risk scratching the wearer's prescription lenses. For people with prescription glasses, there are also large framed sunglasses to designed fit over another pair of glasses. They are not always the most aesthetically pleasing, but may be more convenient for tasks like driving as they are easy to slip on and off quickly. Interestingly, the "shaded clip-ons" have started to make a comeback for a specific application: 3D glasses for 3D movies in a theater or on a passive-3D TV set. Aviator sunglasses have large curved lenses designed to provide protection from light while reducing the wearer's field of vision as little as possible. Association with pilots and other people engaged in active pursuits contributed to their fashion cache, and they enjoyed a particular boom in popularity during the 1970s and early 80s.
20th Dec '12 2:44:40 PM nombretomado
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''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens that one would use to correct the vision of one eye and would squint to hold it in place. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''Literature/ASeriesOfUnfortunateEvents''.

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''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens that one would use to correct the vision of one eye and would squint to hold it in place. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''HarryPotter'' ''Literature/HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''Literature/ASeriesOfUnfortunateEvents''.
18th Aug '12 3:50:14 AM Antwan
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''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens that one would use to correct the vision of one eye and would squint to hold it in place. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''ASeriesOfUnfortunateEvents''.

to:

''Pince-nez'' are a very early form of spectacles (16th or 17th century) that were most popular circa 1880 through 1920. US Presidents Teddy Roosevelt and Woodrow Wilson wore them. The pads between the lenses literally pinched the bridge of the wearer's nose by means of springs to keep them in place, hence the name. In contrast, a modern pair of glasses may have pads in the same places that a pince-nez might have them, but they aren't nearly so tight. Those who were more self-conscious of their appearance might wear a "lorgnette," a pair of framed lenses on a handle, rather like some forms of carnival mask. The handle, in turn, is often attached to a chain or cord of some kind. People using these often only bring them to their faces for close inspection of something; it's as if the polite interactions with one's peers are thought to be impossible with the "mask" of spectacles as a barrier. They were almost always used by upper-class women, generally in Europe and North America during the 19th century. A monocle is a single lens that one would use to correct the vision of one eye and would squint to hold it in place. Given the current social acceptability of glasses and the availability of contact lenses, historical forms of spectacles mainly appear in works as part of a setting meant to seem antiquated, as in the ''HarryPotter'' series, or as part of an AnachronismStew setting, such as that of ''ASeriesOfUnfortunateEvents''.
''Literature/ASeriesOfUnfortunateEvents''.
29th Jul '12 11:08:48 PM AkivaraPrime
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Added DiffLines:

Another variation is "moonglasses", made for low-light conditions. Instead of protecting from UV (though some do that too), they cut down on glare (such as the headlights from the oncoming lane when driving) and make it easier to see in a dark place with lights. Sunglasses could do this, but they would make it even darker and defeat the purpose. They are usually bright yellow.
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http://tvtropes.org/pmwiki/article_history.php?article=UsefulNotes.CorrectiveLenses