I beg to differ there Paul, but Chuck is correct. If Don was try +1.00 readers at his local store (always in front of his prescription glasses) at they gave him perfect reading vision, then he would ADD the +1.00 to the SPHERE value of his original prescription. Take his left eye for example -0.75 plus +1.00 = +0.25
Not meaning to be argumentative, but when *I* went to school (back when they still taught *real* math) ADD meant...well...ADD. And he should "definitely" include the CYL and the AXIS with that. Without them, he may as well buy over-the-counter readers because that is what he would end up with. The CYL and AXIS are there to correct for astigmatisim. Some people can get headaches from even slightly uncorrected astigmatism. Here's a couple of links where you can learn more about prescription eyeglasses and how to decipher all those numbers: http://opticampus.com http://www.eyetopics.com especially this one http://www.eyetopics.com/articles/40/1/Your-Eyeglasses-Prescription.html /SOAPBOX MODE OFF/ -=# Firewalker #=- On Mar 7, 9:14 pm, Paul <[email protected]> wrote: > On Mar 4, 11:03 pm, Chuck Knight <[email protected]> wrote: > > > Reading glasses are nothing more than your regular prescription with a > > stronger SPHERE value. > > That isn't quite right, since the regular prescription is for > nearsightedness, and thus a minus prescription. A reading or computer > prescription would be weaker in the minus direction, and with a weak > minus prescription to begin with, they might go into the plus > direction. The original inquiry is a good example of this. > > My guess is that the reading prescription would be somewhere in the > +0.50 to +1.00 range. Try reading with +1.00 at a local store. (I've > never seen a weaker prescription than +1.00 at local stores; If you > happen to find any, try them, too). If that seems too strong, get an > inexpensive pair online with about +0.50, and you should probably > include your CYL prescription, too, though you might want to ask your > eye doctor about that. Use the smaller of your two PD values. > > If the +1.00 seems too weak, local stores should have glasses that go > up in the standard 0.25 increments from that. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
