Thursday, October 18, 2012

What does SPH mean on my contacts prescription?

I have gone to get my eyes checked (the new DR didnt ask if I see through one lens better than another he simply flicked them around then was done) and in comparing my prescriptions I see better with my old prescription before him (-2.25), than my newer prescription he gave me (-2.75).Is this possible? I dont know much about how to read the prescriptions but I would think I would see better with my newer pres.than my old one since the number is higher. I could be completely wrong though.
>>> What does SPH mean on my contacts prescription?