If it was evident that they couldn't see (blindness was very evident) they might be exposed (abandoned and left to die). The extent of how often exposure actually happened, and what its actual intentions were, is debated though, but it is something that pops up often in common myth (Moses, Romulus, etc).

But then you have to consider what we might actually use glasses for today. Not everyone is near or totally blind, most people just need them for things like reading road signs while driving, or reading books. But, in antiquity these things might not have been as necessary (especially driving). So a lot of these people would have lived fairly normal lives.

And once you lived past a certain age, you were expected to live a life into old age, so teeth would fall out, eyes would weaken, and other parts of the body stopped working as well just as they do today. But you would stay as part of the family, live with them, and be taken care of.

As for things to help people read, certain crystals, and glass, can magnify things (hence a magnifying glass) and these things were known and used for reading and other purposes since antiquity.