Tue Sep 20, 2016 7:36 am by bracesfan

Gerard

I hadn´t known your age before. Now it seems to me that you are somewhere around 40-45.

You are myopic all your life. Due to your aging you became presbyopic as well (presbyopia is stiffening of eye lens and gradual loose of accomodation). It means that a myop is able to read without glasses for near longer than an emetrop). When your presbyopia reaches your myopic correction you get plus.

But it has nothing to do with astigmatism. Astigmatism is a problém when your eyeball or cornea isn´t pefectly round. The eyeball then has two perpendicular axes and each of them has different correction. So you can write the prescription in two ways. It seems you now have +0,25 with -2,5 cylinder. So +0,25 is in one axe (150 degrees), -2,25 in the second one (60 degrees). You must do the math: +0,25 -2,5 = -2,25. 150 and 60 degrees - axes are perpendicular. So one way of prescription is +0,25 cyl. -2,5 at 60 degrees. But you can put it down with the second axe firstly: -2,25 cyl. +2,5 at 150 degrees. I showed it for your right eye, axes in your left one are at 20 and 110 degrees ...