>From what I understand, High Definition Lenses (HD) utilize the Wavefront concept of optics and physics and utilizes a CNC machine to cut lenses specific to your eye correction.
Read about Wavefront here: http://en.wikipedia.org/wiki/Wavefront and here: http://en.wikipedia.org/wiki/Wavefront_coding Read an article about HD lenses here: http://www.opticourier.com/1webmagazine/2007/09sep/content/high-definition-lenses.asp Oakley, among others makes some products with HD lenses: http://oakley.com/innovation/optical_superiority/hdo I spoke with a couple trusted opticians in Los Angeles and they had high praise for Augen Optics from Mexico, which do a series of HD lenses in many materials: http://www.augenoptics.com/index/Main/Augen_Usa/Professional/Defining_HD.html In layman's terms, HD lenses are 'Surfaced' on both sides of the lens to try and best 'match' your eye's correction. Theoretically, this would make for much more accurate vision, as there is no part of the lens that is not optically shaped to correct your vision. One can speculate that these new technologies, which cost much more than standard 'traditional' lens manufacture, are an attempt to keep the high-profit margins within the Brick and Mortar's (Optometrist) pocket. Which has been a traditional sales tactic for all things, "oh, you have a very 'complicated' prescription... you would be a good candidate for the 'new technology'.... you can buy that here... regularly the price is XXX, but since you're a great customer, we can discount it to YYY". Pragmatically however, this technology might be a very good option for those of us with complicated corrections, which have not been satisfied with existing lens technology - after all, the traditional lens manufacture techniques have not really changed in about 100 years. I think that if you trust your optometrist, then you should consider his/her opinion and look for this solution. I believe that you need to have your eyes scanned first, then they can design HD lenses based on your exact correction. I don't think the low- cost online places that this blog is about could provide such a service - but I will wait for others to confirm. If you end up going for such a solution, please post as much of your experience here for all of us to share and appreciate! John On May 14, 8:44 pm, judith_in_ottawa <[email protected]> wrote: > Hello, I just visited my wonderful optometrist to check my > prescription for progressive lenses, and she recommended something > called high definition lenses, which she said were digital lenses, > made by computer, using technology similar to that used in the Hubble > telescope. > > Does anyone know anything about these lenses, and whether there is any > online source for them? She said they were better lenses that did > make a difference. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
