Once upon a time, I used to have perfect eye sight, but age has finally caught up with me & I now wear variofocals for reading, telly, computer work & driving.
I won't walk along the street in them tho', in case I bump into anyone I know - pardon the pun!
I first noticed prob's when I was either closing one eye, or squinting to read.
I find wearing glasses a real nuisance & even tho' I have two pairs exactly the same, I'm always losing them!
Maybe I shall try contact lenses again.....