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Medical Forum / General / Vision / July 2005Chart of standard contact Optical Zone sized
Is the information available that shows the standard Optical Zone for the available contact lenses on the market? I'd like to do some of my own investigating on solutions for my issue with contacts and my big pupils. I was content with Surevue, but they were bought by Acuvue (sp?) and now evidently are made the same way, which doesn't work for me. I tried them. I'm now using the Frequency 55 Aspherics which minimizes the issue because of how they are constructed, but I'd like to get the data about what contacts might have a naturally larger Optical Zone. Either that or does someone know who makes contacts with the largest Optical Zone (without getting custom made)? Bob > Is the information available that shows the standard Optical Zone for > the available contact lenses on the market? I'd like to do some of my [quoted text clipped - 9 lines] > > Bob Your eye doctor has access to that information from a privately published directory of lens parameters. It is not available to the public. I find it very useful in helping contact lens wearers who have larger pupils. The range of soft lens optic zones varies from 7.0mm to 10.5mm. Freq 55 asphere is 8.0, on the small side, although I cannot understand how they would figure the OZ on an aspheric lens, unless it becomes aspheric outside the OZ, which is not the case in this case. --LB, O.D. Why would this information be kept from the public? I must get it from my eye doctor? I believe I have the right to the access of this data. It would facilitate my discovery of a better lense by being able to narrow down my search. I have noticed my low light reading ability has been reduced as well from these contacts. What contacts have approx. 9.0 mm? That might be a good place to start. i don't believe there is any attempt to keep you from getting this information. probably you can get it from the manufacturer's website. however, this information is conveniently tabulated and sold to eyecare professionals in a publication called Tylers Quarterly. i don't have a copy handy to give you the information you request however. it is useful in choosing specific brands of contacts for persons with large pupil sizes, etc. Actually, you were a big help. I wasn't aware of the name Tyler's Quarterly. Some searches on that pulled up a discussion and where you can get similar information from a web site called www.eyedock.com. Doing a search on contacts with 9mm or greater gave me a list I can work with. It also gave me some links to information such as what kind of process was made to create the lenses, how they are shaped, etc... Very useful indeed. Bob glad to help. there's no need for us eye docs to hold such information tightly, we offer professional services not secrets. power to the people ;) |
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