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Extended wear is wearing the learning without removal, usually for at least 7days/6nights or a max of 30 nights. Like Oasys and Biofinity. |
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Your answer did come out a bit rude, actually. SandiStix was just trying to clarify your question. A person can be knowledgeable about a subject without knowing all the terminology. Besides, if I don't know what "extended wear" means, once you tell me, then maybe I'm very clever at doing Internet searches and can find the answer that way. It sounds like SandiStix has answered your question anyway. According to www.lens.com. this is a 1-2 week, at least 7days/6 nights, extended wear contact lens. |
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Anything other than daily disposables is not extended wear. In my explanation, I mentioned extended wear would be a 1-2 week (or monthly) lens that can be worn up to a period of 6 nights or 30 nights, without removal (they're able to be slept in). It's then either disinfected upon removal or disposed of, depending on the wearing schedule or recommendations by the care provider. I also gave two examples of currently approved lenses in the US in my first response. SandiStix wasn't really able to answer my question. I'm aware that the lenses are currently approved for 1-2 weeks of daily wear only. My question was is anyone knows (whether it be through current approval for EW in another country, or word of mouth from a Cooper rep) if Coopervision is currently applying for EW for Avaira in any country or if it is already approved in any country for EW. Lens.com lists Avaira as being 1-2 week disposable, I didn't see it mention any pending or current approval for extended wear. |
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I thought you could wear Avaira contact lenses for up to seven days and six nights without taking them out. Fourteen days if you take them out every night. Lens.com says "Avaira are naturally moist two-week silicone hydrogel contact lenses." Is that not extended wear? Sounds like this concept is not as simple as you said in the beginning of this thread. |
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Again the concept is a lens can only be extended wear after its been approved for such, in USA for example by the FDA. Also, again not trying to be rude, but I don't think the concept is complicated. I just think that anyone who not really aware of what it means for a lens to be extended wear in the first place, would be the best person to even attempt to answer my question. This thread is about the potential potential that Avaira will become an extended wear lens, not the definition of an extended wear lens. |
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Dk/t is not high enough and lens should not be worn overnight anyway, c'mon, couple min insert in morn, and couple at night is not worth messing your eyes up with overnight wear, i dont care what OD's, manufacture or package says, dont wear overnight, its just common sense. but that is what is lacking is this country is common sense. i'd rather F***** something up and blame someone else, then win the medical lottery than actually take responsibility for my own actions, so be it!!
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It's not because I'm lazy. It's because for me comfort is actually extremely better the following day when I would wear Oasys overnight. Vision was better too, I'm not sure why this is the case but I made wearing experience much better for than reinserting every morning, I end up with more irritation ms reduced wearing time
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I think all questions are welcome here on Lens 101, except maybe personal questions that people don't feel comfortable answering. There's a post in here where someone says that when she spends the night with a guy, she usually keeps her contacts in. There are a whole mess of very personal questions about that I wouldn't want to see here in this forum. Fortunately, none were asked. |
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So where else am I supposed to get information about my contact lenses? You?
I'll believe the package, the manufacturer and especially the eye doctor who can actually examine my eyes long before I trust some stranger on a forum. |
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I think I'll just ask my eye doctor, though. He knows a thing or two about Avaira contact lenses. He's been in the optometry business for years. Perhaps he can help me with my crystalline structure drawing. Can I find patents on line? |
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Sure I can read about contact lenses, I can even read your know-it-all posts here on Lens 101, but I still haven't actually fitted anyone with them and gotten their feedback, nor gotten a license to practice optometry. I read a lot. Perhaps you'd allow me to fit you with contact lenses, just like one of those "bonehead" eye doctors? What do you say? |
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Nor do I have a access to a laboratory to "do some tests." Who do you think you're dealing with here, rocket scientists? Tell you what. Why don't you draw the crystalline structure of the Avaira lens of your choice, and then post it here so we can all ooo and ahh? You know . . . show us how it's done. |
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![]() Perhaps mekmek86 meant to say "anyone who would have to ask that question probably wouldn't understand the answer" or something. I don't know. |
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Please ask your doctor for documentation on this. I have seen zero FDA or vendor/manufacturer approvals on this.
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Here is what I found online about these lenses:
This is coming from the Coopervision website: The only naturally wettable two-week silicone hydrogel. There are many reasons why contacts feel comfortable. But to provide a truly exceptional level of comfort, there is one general rule a lens must follow: moist is good. Avaira contacts are made from a unique material that attracts and binds water within the lens itself, keeping them moist and comfortable without the need for surface treatments or wetting agents. I wore these lenses before, and they are very comfortable for a week, then start to get kinda uncomfortable. And this was in a new article: Biofinity and Avaira offer unique Aquaform™ technology creating a naturally wettable, exceptionally comfortable lens for the contact lens patient. Biofinity has received approval by the FDA for extended wear. “Biofinity and Avaira contact lenses are third generation silicone hydrogel lenses that offer premium performance and a high level of wearing comfort,” stated John Weber, president of CooperVision. So Avaira is NOT extended wear. Its a daliy wear lens for 1-2 weeks. Avaira------enfilcon A (46%) (Dk = 100) Biofinity----comfilcon A (48%) (Dk = 128) Night and day--lotrafilcon A (24%) (Dk = 140) So as you can see, biofinity has a Dk value of 128, and you can sleep in the them for up to 7 nights, because your getting a good amount of oxygen to your eye. And night and day have a huge Dk value of 140, so thats why you can sleep in those for up to 30 nights. And i'm guessing since Avaira have only a Dk value of 100, they are NOT meant to be slept in. Just call any eye doctor and ask them if Avaira are meant to be slept in and see what they say. I hope my info. comes in helpful. |
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A useful post. I did look at the FDA website but it has no extended wear info for Avaira, (or rebranded SofMed Breathable) or Aquair all made from enfilcon A material. One point worth making is that the FDA no longer grant 30 days extended wear approval. As far as I know it is now limited to one week extended wear. knotlob |
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So "extended wear" is anything between seven and thirty nights of continuous wear?
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knotlob |
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Okay, thanks knotlob and Spicegurl. I've seen that phrase "extended wear contact lens" thrown around, but the definition was never given. Thanks for clearing things up.
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This is coming from the Coopervision website: .......... And this was in a new article: ........ .............stated John Weber, president of CooperVision...... is that not enough? The rest I actaully wrote in pretty much my own words, I have done alot of research on contacts lenses, Its kinda an interest of mine. I got the Material and Dk value from http://www.clspectrum.com/article.aspx?article=104480 But thanks for letting me know for next time. |
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Just so everyone is clear, 168 hours is 7x24 hours.
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