My prescription glasses hadn't changed in almost two years. I had my eyes checked around 3 months ago, and they still hadn't changed (they were both 2). Recently I was having problems with my glasses and I visited the doctor again my left eye was still 2, but my right eye had suddenly changed from 2 to 3 . The doc wrote me a new prescription, but told me it's up to me whether I want to change my glasses.

What should I do? Is there some reason for what's happened? I remember I was kneed in my right eye a month ago when we were on a trip with my friends and fooling around (wrestling). Could that be the reason? Could it go back to 2 again? I also had my final exams just recently and been studying a lot. Should I change my glasses? Or wait a while to see what happens? If I don't change my glasses, it won't damage my eye, will it?