A pd off by 4 on a pair of -4.00 would produce prism. This can be calculated using Prentice's formula. You might get some "pulling" of the eyes and some distortion. You would also probably get used to this, but when you get another pair on pd, they might feel wierd for a while.
The higher the rx and the more you are off pd and whether the ocs are in or out all affect this, some people can tolerate more than others. On Jul 25, 1:37 pm, RE <[EMAIL PROTECTED]> wrote: > You would think that optical training is fairly standard, and that > good and accepted practice in making glasses would be the same across > the board. I tried to order a 53mm lens frame with a PD of 60 from > Zenni, and it wouldn't allow me too telling me my PD was too small for > that frame. I just did a test at 39dollarglasses.com and it let me > order a 54mm lens frame with my PD of 60. Is Zenni being overly > cautious, or is 39dollarglasses not programmed correctly? I think > someone else ordered from there and posted here that someone from that > site was surprised the site let them order the glasses. Another site > also let me order a larger lens size with my PD. > > I just called Cohens Optical and they said a 2mm difference in each > eye wouldn't make a difference, and that at the most I might get some > distortion on the edges. Has anyone had a PD off by as much as 4mm in > a -4.0 Rx and been able to see OK? Some eyeglass sites even do an > average PD if you don't have your measurement. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
