it'd be best if you go see an optometrist. they're the professionals and they'll know what would be best for your eyes.
but until then, i've been told you shouldn't watch tv or be on the computer for too long. if you need to though, then at least take breaks for your eyes and go outside. :)
It's not that you are becoming short-sighted. Short-sighted is not an eye disease, but rather, a focusing disorder due to genetics. It is inherent in your genes. So is astigmatism.
So if you are only starting to experience this problem over the last 12 months, you had better consult an ophthalmologist.
If the symptoms you are getting include seeing floaters, then it may be serious.
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