How blind are you?

[Mark]

Originally Posted by SidewinderINC

Possibly a weakness in the muscles that control the focus etc.? you can do without glasses but the muscles are working overtime so it gives you a headache after 20 minutes.

The glasses just make life a bit easier on the muscles

I'm just guessing and have no idea if that's even possible.

It's probably close, though I'd raise some doubt over it being the muscles that are the cause.

The problem with that approach is that the eyes get lazy - once you start wearing glasses you'll soon find you can't do without them at all.