On Sep 22, 7:18 pm, "Chuck Knight" <[EMAIL PROTECTED]> wrote: > Frankly, I'm confused too. I've always been told that the combined total of > the sphere and the add equals the reading prescription.
He also changed the + cylinder values to - cylinder values. When you do that, you apparently have to adjust the sphere values in addition to changing the axis values. Still, the numbers don't really add up. How did this: +2.75 +0.50 x 010 +2.75 +0.25 x 005 turn into this? +3.25 -0.50 x 100 +2.75 -0.25 x 95 --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://www.glassyeyes.com! You received this message because you are subscribed to the Google Groups "GlassyEyes" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/glassyeyes?hl=en -~----------~----~----~----~------~----~------~--~---
