These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Invisible Man
Unfortunate Implications: Characters who are metaphorically blind to the reality around them are also physically blind, which helps drive the point home to the audience. However, it also makes the book rather uncomfortable for audience members reading it in Braille.