Cylinder can be written as either a positive or a negative value...the resulting + and - values must result in axis values separated by 90 degrees.
Talk to your doctor...see if it can be rewritten as a different combination of values. Negative value is the industry standard, but sometimes the numbers can be massaged, a bit, to fit into the necessary blanks. We had a fairly long discussion about it, in the last year or two I believe. We had an eye doctor explain how to do the conversion, and why the axis had to be adjusted 90 degrees. http://groups.google.com/group/glassyeyes/browse_thread/thread/2adffaf410c6f9d7/2d267c6557a1300c?hl=en&lnk=gst&q=negative+90#2d267c6557a1300c It might be of some help to you...maybe it can be rewritten to use standard blanks? If I'm not mistaken, the equivalent correction would have a stronger sphere and a *much* weaker cylinder, resulting in the same correction. -- Chuck Knight On Tue, Jun 1, 2010 at 5:05 PM, maya <[email protected]> wrote: > Alright, here is my current rx (sorry for not including that in my > original post, oops) > > OD: sphere -1.50, cylinder -2.25, axis 061 > OS: sphere -1.00, cylinder -6.50, axis 156 > > Zenni told me they won't fill rx with a -6.50 cylinder (but I feel > better about Zenni just because they replied -- I'd been reading some > things about that being an issue) > > I was talking to someone about my problem the other day, and he said > maybe I should just order a pair using the -6.00 cylinder and see how > it worked out. I was afraid to try this because I wasn't sure how > that'd affect me, so the other night I went through my papers and > found my previous prescription from a few years ago. Apparently back > then my cylinder was measured at -6.00. I found my glasses with that > rx and wore them for a little bit and I can still see well out of them > with my left eye, so I decided to give it a go. > > While not ideal, I ended up going on to Zenni and buying a test pair > of glasses using my current rx with a substituted -6.00 cylinder. I > received an email from to confirm my rx, and they're now making the > glasses. I hope this works out alright. It was cheap enough that I > won't freak out if it's awful, at least > > Any thoughts will be much 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 > -- 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
