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Medical Forum / General / Vision / January 2008Wearing bi-weekly contact lenses longer?
I have CooperVision CE and have been using a set for about 3 months now with no apparent issues. Basically, I have been using them like annual contacts. I do get heavy protein deposits so that the contact lenses require cleaning every 3 days or so with enzymatic cleaner. I wear them 2-3 days per week at most, every other day. About 12 hours per day at most. I've had one contact lense tear, as the bi-weekly lenses are thinner and easier to tear than annual ones. I understand that one rule of thumb is, if you can feel contacts, you shouldn't wear them. Question, do these lenses degrade with time, and should they be replaced even if they look good and everything feels right? When you buy a 6 pack of disposable razors, do you wait until you bleed one-too-many times before you change them? When you buy a 6 pack of underwear, do you wear each pair until they are disgusting, and then go for the next one? If you answer "No" to those questions, you can understand what the answer is to your question. Disposable contacts are a commodity, like a razor, and you should let your calendar tell you to throw them away, and not your eyes. Today's lenses are so comfortable that they can be two sizes too tight from build-up and still not "hurt". Throw em out. Save money on skipping bottled water, not your eyes. > I have CooperVision CE and have been using a set for about 3 months > now [quoted text clipped - 20 lines] > replaced > even if they look good and everything feels right? doctor_my_eye@msn.com <doctor_my_eye@msn.com> wrote in part: > When you buy a 6 pack of disposable razors, do you wait > until you bleed one-too-many times before you change them? No. Razors nick me more when they're new. I replace razors when they pull too hard and don't cut [skip] hairs. Amazing quality differences. > When you buy a 6 pack of underwear, do you wear each pair > until they are disgusting, and then go for the next one? No. I wear one pair for one day, then follow appropriate cleaning and disinfection protocols and solutions. Then wear again. Only discarded when no longer serviceable. > If you answer "No" to those questions, you can understand > what the answer is to your question. No, "no" can mean more than one thing. "Yes" is more specific > Disposable contacts are a commodity, like a razor, and > you should let your calendar tell you to throw them away, > and not your eyes. Why? And more importantly, why believe the FDA is correct? What confidence limits are they using in their testing? What is the dispersion/std.dev of results? Yes, 95% of wearers may exhibit no detectable incremental pathology between one week wear and two week wear. But what if you are part of that 5%? Or part of the 70?% who would see no increase at four weeks? People should know their bodies, and ideally their opth would test them out. > Today's lenses are so comfortable that they can be two sizes > too tight from build-up and still not "hurt". Throw em out. What "two sizes"? BC is the usual fitting parameter, and "two sizes" is something like 8.1 vs 8.9. If that much protein builds-up, visual acuity will be shot. And the lenses will hurt like _h3ll_. The newer silicone hydrogels are only more comfortable with respect to oxygenation and retarding (not eliminating) neovascularization. No better for fit. > Save money on skipping bottled water, not your eyes. Why do you believe saving money is the primary motivation? Are you projecting your values? -- Robert
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