Blind is a turn often used to describe the visually impaired yet has a true meaning lost in translation...
A person who needs glasses to see is the purest form of blindness. Nobody understands their pain because they assume the glasses help them see just a little bit clearer when in reality, no matter nearsightedness or farsightedness, the accumulating blur that becomes your vision over the years of letting your eyes use bifocals as a crutch becomes humiliating. The slight wrongness of your sight is like having a popcorn kernel stuck up your a- I mean, in your teeth. And when fate leads you to be unable to fix a slight irritation, either by a scratch on your lenses or the way you look without your glasses on!...that is true blindness.
Todd: "I thought you were nearsighted...?"
Fabio: "Don't fucking bully me my pain is far greater than any of your peasant mind can handle!"
Todd: "Ok, good point. Your glasses are on your head."