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Medical Forum / General / Vision / December 2005any of you use day and night contacts?
any of you use day and night contacts? You can sleep in them and stuff right You cannot sleep/nap in normal contacts can you? yes >any of you use day and night contacts? > >You can sleep in them and stuff right > >You cannot sleep/nap in normal contacts can you? > how many days do you wear them? William Stacy <wstacy@obase.net> wrote in news:JdHsf.39563$7h7.36144 @newssvr21.news.prodigy.com: > yes > [quoted text clipped - 4 lines] >>You cannot sleep/nap in normal contacts can you? >> maximum 30 days None now. Have gone non-stop for 3 days in the past. No problem > how many days do you wear them? > [quoted text clipped - 8 lines] >>> >>>You cannot sleep/nap in normal contacts can you? I discussed exactly this with my own optometrist nearly a year ago and he seemed shocked and said oh no, this is very dangerous! I get patients all the time with infections and diseases from sleeping in their contacts! I searched the internet and he is right, your risks increase at least tenfold if you sleep in contacts and those are 30 day wear so the risk is quite big. Ive discusssed this with other optometrists and its the general concensus that its OK if you occasionally sleep in them then take them out in the morning to give your eyes fresh air for a couple hours before inserting them back in. Never keep them on day after day for weeks at end. OrthoK would be much safer and something I personally am looking to try. You sleep in those, however they come off in the day and all day your eyes get oxygen and clear vision. After some time you only need to sleep in them 1 or 2 nights a week! The rest of the time you are free to enjoy clear uncorrected vision! Spockie, this is something you might be interested in as well! Personally I am supprised why orthoK isnt more popular for low and sometimes moderate myopes over laser surgury! Ok so what if its a tiny bit of hassle to take 2-5 minutes to insert, remove and clean your contacts? Much preferred over the risks and permanence of laser surgury > OrthoK would be much safer and something I personally am looking to try. > You sleep in those, [quoted text clipped - 7 lines] > your contacts? Much preferred over the risks and permanence of laser > surgury Ortho-K is not necessarily any safer: the data to quantify the various risk factors is just not available yet. There appears to have been 50 confirmed cases of MK since 2001, with 88% of these being in asian eyes (which is probably reflective of the wearing demographics). What is of concern is 30% of the reported cases involved acanthamoebal infections. Inappropriate lens care procedures, patient noncompliance with practitioner instructions, and persisting in lens wear despite discomfort emerged as potential risk factors. Source: Eye Contact Lens. 2005 Sep;31(5):201-8, "Ortho-K is not necessarily any safer: the data to quantify the various risk factors is just not available yet." OrthoK is much safer than extended 7 and 30 day continious wear contact lenses. Its probably almost as safe as regular wear contacts and some claim its as safe because orthoK is very oxygen permable, much more so than most soft contacts. Plus durning the day you arent wearing anything at all so your eyes get all the oxygen they need. "There appears to have been 50 confirmed cases of MK since 2001" Thats about 10 cases per year. I think this super low risk is worth it. There is many, many times more cases of all kinds of complications with laser surgury. Of course glasses is risk free but I want to reduce my dependancy on glasses so im looking to get orthoK "Inappropriate lens care procedures, patient noncompliance with practitioner instructions, and persisting in lens wear despite discomfort emerged as potential risk factors." Then I had better print the instructions and follow them to a T and listen closely to my optometrist and Ill be fine. At a conference I was at recently, this subject came up, and the feeling was that the cases of MK tended to be more severe, and affect younger patients (although again the younger patient probably reflects the demographics). One risk factor with OK not present with other lens modalities is the fact the lens is handled and placed in the eye just before sleep, and hence flushing of the tear film behind the lens is minimal. One suggestion that came up was OK lenses should be placed into the eye maybe about an hour before sleep, which will allow any nasties transferred to the lens from the finger opportunity to be washed away by the normal tear flow. > "Ortho-K is not necessarily any safer: the data to quantify the various > risk [quoted text clipped - 21 lines] > Then I had better print the instructions and follow them to a T and > listen closely to my optometrist and Ill be fine. I find your comments interesting, TG. I look at overnight OK from the following perspective. The incidence of microbial keratitis from sleeping in a soft (conventional hydrogel) lens is about 1/500 per year, confirmed by numerous studies. But, loss of vision occurs in only about 13% of those cases. This is because the location of the ulcer is random, and probability dictates that it will more likely occur off the visual axis. The cause of ulcerative keratitis is adherence of bacteria to a compromised, roughened epithelial surface. The cause of the compromised epithelium in this case is hypoxia. With OK, the epithelium is thinner centrally as it is literally pushed away by the pressure of the lens. The cause of the compromised epithelium is mechanical. Therefore, the forces likely to cause epithelial compromise are concentrated on the visual axis, with a greater likelihood that an infection will occur there, or in very close proximity. Therefore, if an ulcer does occur, it will certainly do more damage. Naturally, the presence of acanthamoeba suggests improper lens hygeine and the use of tap water to rinse the lenses prior to insertion. DrG
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