In an effort to get my lenses thinner I went up from a 60 PD to a 63 PD on my larger sunglasses with 53 mm and 54 mm lenses. They won't let you order them for less than a 64 PD, but I left a note there, and they said they can do 63. It worked well and I don't notice a difference. Some peoples PD's aren't equally balanced anyway, and a 60 PD might be a 28 in one eye and a 32 in the other. If mine is equal, i's only off by 1.5 mm in each eye. I looked every which way out of the lenses and didn't notice any distortion. I also went down a bit on my Rx to get them thinner, and they still feel fine.
On Sep 4, 11:09 am, onlineIDoc <[EMAIL PROTECTED]> wrote: > 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 -~----------~----~----~----~------~----~------~--~---
