Seems to be a delay when posting on this forum. Thanks Chuck for your responses, I am at -5.00 for my lenses (distance). And ironically I am a programmer, I usually don't start at zero, I just thought of another question while making that list and figured it'd be best to ask first before the rest, hence I went backwards and put it as zero :)
I submitted my order to Zenni and added the different PDs in the comments section, we'll see how it goes. My local Lenscrafters has agreed to look at the lens to ensure it makes my prescription. Will keep all posted. On Feb 15, 2:56 pm, Chuck Knight <[email protected]> wrote: > 0. Most people are symmetrical, or darned close to it. In your case, the > asymmetry is a little more pronounced. Mine are only about 0.5mm off. > > The two numbers represent the measurement from the center to your left > pupil, and the center to your right pupil. You add them for your PD > distance. > > 1. Most of the retailers I'm familiar with have a "special notes" field at > the end of the ordering process. You just type in any special instructions, > like your monocular PD measurements, in that field. This is where I always > put my monocular PD measurements, even when ordering from Zenni. My results > have been nothing short of perfect, every time. > > As to its importance... PD is important, but it becomes much more critical > at higher prescription strengths. What is your prescription? > > 2. Even as critical as it is, 1/2mm variation is not going to be > significant. Flinching, moving, and daily variations in fluid pressures can > cause measurement errors greater than that. Round it in either direction. > Precision is important, but there's no reason to bring out the OCD. > > -- Chuck Knight > > P.S. I'm guessing you're either an engineer or a programmer. You started > counting at zero... :-) > > On Sun, Feb 15, 2009 at 12:38 AM, 703 Crew <[email protected]> wrote: > > > Hello there - > > > First time internet glasses shopper here, and it was hell getting my > > PD measurement. I finally got them and some binocular thing was used > > and it gave me: > > > 29.0 R and 27.5 L > > > I have found that a lot of internet retailers just ask for the sum of > > both numbers, but is there anywhere where I can get my right lens > > calibrated for 29.0mm and 27.5mm for the left eye? I am guessing if I > > submit a request for PD of 56.5 they are assuming a symmetrical split > > of 28.25mm/28.25mm which is not the case... > > > 0. If PD is just a measurement from pupil to pupil, why did the > > binoculars give me two different numbers? > > 1. Does this matter? Should I pursue somewhere that will do PD per > > eye (since mine is not even) or is it okay to sum it up? > > 1b. Does anyone know internet retailers that do PD per eye? > > 2. If my number is 56.5, should I round up or down? > > > Thanks in advance, > > T --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
