How come some people wear glasses while others dont?

Question

Obviously people with bad eye sight wear glasses, but how do they get bad eye sight/ how to aviod?

is it reading 2 much or 2 much tV or what?

Answer 1

It's just one of those things - you either have bad eye sight or you don't, or it just happens over time.

I'd never had anything wrong with my eyes when I was younger, but then when I was 11 I had to get glasses.

It's confusing.

Answer 2

it could be all sorts of thing as genes, focusing of the eye, just plain bad eye sight.

Answer 3

if the power (focal length of the eye ) and the length of the eye are same they dont need glass if people have different eye length and focal length they need glases.

neither it is due to reading nor watchin tv.... if can never be due to use of the eye ........

Answer 4

Too much TV is bad, and too much computer time is bad.

Answer 5

I always figured you were born with it and it just got better or worse throughout life.

Mine got worse =(

Answer 6

I think more people are getting glasses because of things like books, computers, old age and spending more time indoors than outdoors, genetics and not looking after our eyes properly.