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I have trouble seeing far away a bit (I don't have terrible vision, it's like 20/30 with mild astigmatism, but it's enough to make a huge difference when in lectures at school), so I got glasses about a year ago to wear primarily while in class. I was told that I could wear them all the time if I wanted, but it doesn't really matter much. Well some days, especially when I'm tired, my eyes just can't focus period, and I have to wear my glasses all day if I want to be able to function. Is this normal/why does it happen? I know that it's common for eyesight to get worse as time goes on, and I've noticed that mine has, and I'm sure that some day I'll have to wear glasses/contacts full time, but now, it seems a bit weird.

Thanks!
Myopia is an elongation of the eyeball itself. It makes sense that vision can change somewhat depending on muscle tension/relaxation, so being tired can worsen the problem. I've read of people who can see better when they are off on vacation. How much of a difference stress/relaxation can make (if any), I have no idea.
This is assuming your only problem is myopia and not an eye muscle/eye alignment/brain thing that becomes apparent when you're tired.
[QUOTE=missyou009;4086117]I have trouble seeing far away a bit (I don't have terrible vision, it's like 20/30 with mild astigmatism, but it's enough to make a huge difference when in lectures at school), so I got glasses about a year ago to wear primarily while in class. I was told that I could wear them all the time if I wanted, but it doesn't really matter much. [B]Well some days,[/B] [B]especially when I'm tired[/B], my eyes just can't focus period, and I have to wear my glasses all day if I want to be able to function. Is this normal/why does it happen? I know that it's common for eyesight to get worse as time goes on, and I've noticed that mine has, and I'm sure that some day I'll have to wear glasses/contacts full time, but now, it seems a bit weird.

Thanks![/QUOTE]

Do you think that maybe it has something to do with you not sleeping? When you get tired and at night when you sleep your eyes produce less tears. Your eyes need tears and moisture. Try to sleep 7-8 hours every nignt. Or maybe you have some type of dryeye problem?





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