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're metaphorically blind to reality are also physically blind, helping to drive the point home, but making the book rather uncomfortable for those reading it in Braille.