Well, I reckon that's the must concise, helpful description and response to a post that I've ever experienced. Thanks, Chuck, for saving me the time of wading through the other threads to try to reconcile the information and figure it all out!
On May 18, 2009, at 10:25 AM, Chuck Knight wrote: > There are 4 columns of numbers...SPH, CYL, AXIS, and ADD. > > SPH (sphere) is the amount of correction you need to see, at infinity. > CYL (cylinder) is the amount of correction you need for astigmatism. > AXIS is how that cylinder should be placed...twisted at what angle. > ADD is the extra sphere help that you need, for reading. > > To make a single vision pair for reading, you do the following: > > Sum the SPH and ADD values, and enter it into the SPH field. > Leave the CYL and AXIS values the same. > Leave ADD empty > Subtract 3mm from your standard distance PD. > > That should get you the results you want. > > -- Chuck Knight > > > > > On Sun, May 17, 2009 at 5:45 PM, Chris Scott <[email protected]> > wrote: > > How do I read my RX to get reading glasses only? > > I've got my current RX, along with measurements taken by an > optometrist a couple of years ago. But I have no idea how to read or > interpret them. > > Any help or explanation would be appreciated! > > > > > --~--~---------~--~----~------------~-------~--~----~ Check us out at the oft-updated http://glassyeyes.blogspot.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 -~----------~----~----~----~------~----~------~--~---
