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Boston EO contact lenses are considered "rigid gas permeables" rather than hard contacts. They aren't as soft as soft contact lenses, though, and I was wondering if you can still feel them after you've put them in your eyes.
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Aren't rigid gas permeables the same thing as hard contacts?
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Thanks for your reply Barry Miller. When you say "you get used to it very fast" how fast was it in your case? How long was it before you began to forget you were wearing your Boston EO contact lenses?
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After building up my wear time, I was told to start with 6hr then 8 then 12 and now I wear them 14 or 15 hrs . So to answer you question about 4 or 5days I was wearing them with no problem. I work 12 hr shifts ( days and overnites) and once and a while a may put a few comfort drops in if my eyes get a bit dry.
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I'm wondering the same thing, JRC. So how about it, Lens 101 members? Are RGP lenses the same as so-called "hard" lenses?
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I was just thinking the same thing, Joey. I'm going to give AceofShades the benefit of the doubt and say that he/she meant to say "rigid gas permeables rather than soft contacts."
Last edited by Zoey; 11-02-2010 at 04:44 PM.. |
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RGP lenses are not the same thing as "hard" contacts. For one thing, RGP stands for "rigid gas permeable" and the "hard" lenses are not gas permeable. Here's what allaboutvision.com has to say: "GP contact lenses are rigid, but they shouldn't be confused with old-style "hard" contact lenses, which are now obsolete. Hard contact lenses were made of a material known as PMMA. Before 1971, when soft contact lenses were introduced, just about all contact lenses were made from PMMA. The problem with PMMA lenses is that they are difficult to get used to and somewhat uncomfortable to wear. Also, PMMA does not allow oxygen to pass through it, and healthy eyes need plenty of oxygen. What Makes GPs Different? GP lenses were first introduced in the late 1970s; they are actually a newer technology than soft lenses. Most GPs incorporate silicone, which makes them more flexible than PMMA. And silicone is oxygen permeable, so oxygen can pass through GP lenses, resulting in greater comfort and better eye health. In fact, GPs transmit more oxygen to the eye than do traditional soft contact lenses (although some silicone hydrogel soft lenses are comparable to GPs in oxygen transmission)." Got it? |
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