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Sometimes, a brand of contact lenses will also go by a generic name, or even a different brand name. Have you ever heard of Boston Envision going by a different name?
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I found a site that tells us that Boston Envision lenses are known generically as enflufocon B. You can probably see why they went with "Envision" instead. |
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Yeah, "Envision" is a lot easier to say and spell.
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That's not the generic name, it's the material it's made from. Other RGPs may be made from the same material, but the design of the lenses would be different.
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So when you go to a site like the one Spongebob found, they don't even have Boston Envision listed, just "enflufocon B" lenses? How can you tell that they're the same thing as Boston Envision?
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So if a website says that they have "enflufocon B" lenses, they may or may not be Envision, depending on the "cut," right?
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Maybe now contact lens Fitter can explain what "single cut" means. |
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Single cut, bicurve, tricurve and multi aspherical refer to the peripheral curves on the edge of the lenses. They help to adjust centration and movement on the lenses.
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I suppose it's too complicated for a "101" site to explain exactly what "bicurve" and "tricurve" mean?
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Why is that? Is it because of the customizable nature of RGP lenses?
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Most lenses are made to order or most RGP lenses?
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And that's why people find RGP lenses uncomfortable?
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Soft lenses are comfortable almost immediately, RGPs take some time because the lenses are hard. If the edges of the lens are polished properly, once you get used to them, they're just as comfortable as any lens but last much longer. I have patients wearing the same RGPs for four or five years. Also, the harder the lens material, the sharper the vision.
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Depends on the material. Softer materials will warp after a time, and even more rigid materials may get scratched up to a point they cannot be polished smooth anymore, or an Rx change. With soft lenses, O2 must be disolved into the liquid of the lens and absorbed through the lens. With RGP materials, O2 passes directly through the material itself, and therefore does not diminish over wearing time as soft lenses do.
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Pretty much. For some people, price has a lot to do with it. In some states, only Dr.s can fit CLs and have you by your wallet, because there's no competition. So, if you can get a year supply of soft lenses for $300.00 and RGPs that wil last for years at the same price, it may be worth taking some time to get used to RGPs. By the way, the two safest lenses on the market are 1 Day soft and RGPs.
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I don't understand. Does that mean that in other states, people who are not doctors can fit patients with contact lenses?
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As a general rule, the base curve (or back surface curve) is fit fairly close to the latest corneal curve. The very outside edges, all the way around, must be flatter again in curvature than the base curve in order give some 'edge lift' and prevent the lens from becoming 'suctioncupped' on to the eye. That would prevent tear flow under the lens and extreme difficulty in removal. While these curves do have a role in centration and movement on the eye, diameter-optic zone, weight of material and thickness of material are importatant also.
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By any other name would smell as sweet." Romeo and Juliet (Act II, Scene ii, 1-2) Just thought I'd add a touch of class to the joint. Looks good, right? Soitenly! |
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You actually looked up the quote. Nice work Spongebob.
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nope also because Boston Envision is a type of material and all boston rgp materials to my knowledge are patented (nobody can duplicate the material technology)
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Yes there is lens edge awareness in the beginning and during the adaptation process but once your eyes gets use to them...You wont feel anything at all..
I have dry sensitive eyes and I got use to rgp's without a hitch...... |
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Would putting out a generic form of the lens be patent infringement? No one is falsely saying that they created the lenses, they're simply selling them.
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getting into these labs is also like fort knox..... |
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These companies spend enourmous amounts of funding on there scientific research. Its pretty crazy to comprehend! |
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Or, as was said on the show from which I took my screen name: "Hired thieves and murderers don't usually work for love."
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Boston Envision Ask a question about Boston Envision, start a discussion, share your opinion, or write an online review and share your experience with Boston Envision contact lenses.
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