When Diagnosed with an Astigmatism, Does Your Contacts Lenses Prescription Get Weaker?
May 4th, 2010 | See the Top Answers to this Question Below
I have -5.25 vision in my left eye and -5.00 in my right eye. Recently I went to the eye doctor and they told me I have a slight astigmatism in my right eye so my contact lens was corrected. I just picked up the box and I’m confused as to why my right eye’s prescription was changed down to -4.50. Is this suppose to happen? If so, why would they make my right eye’s lens weaker if it has an astigmatism?
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I actually asked a question about my asigmatism. If you’re getting hard contacts, I don’t think they’d change your prescription, but if you get soft contact lenses it’s hard to get it to shape to the eye a certain way… I’m not sure exactly, but that’s the best answer I can give.
According to the experts at http://www.Coloredcontacts.com minus (-) 4.50 would be the correct prescription in contacts if the eyeglass prescription is minus (-) 5.00 not counting any astigmatism. It would be less if you have plus astigmatism and higher if you have minus astigmatism. One half of the minus astigmatism power would be added to the -4.50 prescription or subtracted if it’s plus.