I guess most wizards have great eyesight?

McGonagall is described as wearing glasses and so is Dumbledore. Doesn't make much sense though, if they can mend bones in an instant and fetus deletus, then there is surely a spell to give perfect vision.

Why would they need glasses at all? If you have magic, then glasses are always a fashion choice

Hahaha

Percy Weasley and Moaning Myrtle wear/wore glasses

I recall reading something that harry needs glasses because his bad eyesight was caused by the flash off the killing curse but i am not sure if thats canon.

There is no canon spell for that that we know so maybe it wasn't invented yet.