What's the story with computer lenses? Is this some kind of marketing ploy? Why would you wear single vision lenses in anything other than your full correction? Unless I'm missing that we're talking about progressive lenses here.
iPhone On Mar 21, 2009, at 8:37 PM, Firewalker <[email protected]> wrote: > >> I just ordered 1 more pair tonight for computer use. >> >> My normal perscription is >> >> OD -3.50 -1.50 X 24 >> OS -4.50 - 1.50 X 165 add + 2.25 >> >> I ordered for computer >> >> OD -2.50 -1.50 X 24 >> OS -3.50 -1.50 X 165 >> >> Is that correct? > > If that ADD +2.25 is for both eyes, and not just for the left eye as > shown, then yes, that is correct. > > For the record, computer (or intermediate) glasses would have approx. > half of the ADD power added to the original SPHERE value. When it's an > odd number like +2.25, then you'd add either +1.00 or +1.25 to the > SPHERE value. > Just remember, if your original SPHERE is a negative (myopia), then > adding power to it would make the SPHERE go the opposite direction. > (-3.50 ADD +1.00 = -2.50). > > -=# Firewalker #=- > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
