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One thing I’ve learned from my time with this forum is that many people are different. Some people quickly adapt to one kind of lens plus some people don’t.

Polycarbonate lenses have a higher index of refraction (1.586) than CR-39 plastic (1.498) and so are therefore thinner within an equal lens prescription. With an increased index , light is bent better, so that it requires less material to attain the eyeglass prescription making the lenses much lighter. Another significant benefit of these lenses is they are impact resistant. It’s important to notice that impact resistant does not mean shatterproof. They can still break, therefore official safety glasses should be worn for eye-hazardous jobs and sports. Additionally, Trivex and polycarbonate naturally block most UV light , nor need the use of a UV coating.

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line, but I don’t know why they would since they were already carrying it out in-house.

Most importantly, Trivex is an excellent substitute for polycarbonate lenses that require to be tinted, because Trivex could be easily tinted but polycarbonate cannot. Trivex is much better suited for tinting and is a superb choice for rimless drill mounted frames. The suggested prescription range is Plano to +/-8.00 sphere. Trivex could be slightly thicker than polycarbonate lenses, but due to its specific gravity the weight will be similar. An option with high index lenses can be an “aspheric” design, which can donate to a thinner lens appearance and profile. Aspheric means that rather than having a round, or spherical curve on the front surface, the curve gradually changes from the biggest market of the lens to the periphery of the lens.

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Another instance of this is the case of the “featherweight” lenses they sell. Ie for those who have non avp lenses you you would like to look at a thing that isn’t. “Dead on s traight” you then need to swivel your head or the view will be blurry.

• It’s important to notice that impact resistant will not mean shatterproof.
• lenses that I loved them anyway.

Physio/Physio 360 and Hoya Vision iD & iD Lifestyle all use a “freeform” digitally generated surface technology. What this means for you is that there surely is going to be less peripheral distortion in the lens. This means the swimming effect will undoubtedly be less when seeking to the bottom and walking. I mistakenly thought CA was discussing Canada, not California. I should did a search for the precise city and seen that it had been a city in California.

Pupillary distance, frame type, and lifestyle needs may also be indicators. I don’t know what your location is all obtaining the ovation info. Unless lenscrafters bought the ovation molds and re-lasered them all. Maybe different LC’s around the country use different stocks of lenses, because in my store they most surely are not. I would like to learn about the ovations though, because I’ve always had good luck with them. There are plenty of Varilux lenses but within my store they start at $250.00 a pair. Even our top of line Varilux lens is under $600.00 with Crizal.