Corrective glasses were invented sometime around the 13th century and didn't become the norm until much later. Were people with eye disorders considered disabled before this?

by JeanKrad1ly

And how did they manage to live (if they did)?

DanKensington

As people tend to do, they managed. More can always be said on the matter; for the meantime, OP, here's some previous posts for you. u/rocketsocks has a general overview on poor sight, while u/sunagainstgold examines bad vision in the Middle Ages.