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They can be worn up to a week. Daily wear lenses are made of plastic that is permeable to oxygen and absorbs water; therefore, they are soft and flexible. These lenses must be removed and cleaned each night, and they do not correct novelty all vision problems. lenses are easier to get used contact and lenses to than rigid lenses, but are more prone to tears and novelty do not last as long. Extended-wear lenses are highly permeable to oxygen, are flexible by virtue of their ability to absorb water, and can usually be worn for up to one week. They contact do not correct all vision problems. There is more of a risk of infection with extended-wear lenses lenses than with daily-wear lenses. Extended-wear disposable lenses are lenses worn continually for up to six days and then discarded, with no need for cleaning. The distance between the lenses is for a "standard" person. Generally, novelty this will not be a problem, but if a patient is sensitive or has more closely set eyes, for example, it may pose a problem. Persons buying ready-made contact sunglasses or reading glasses should hold them up to see if they appear clear. lenses They should also hold the lenses to see an object with straight lines reflected off of the lenses. If the lines don''t appear straight, the lenses may be warped or inferior.Patients may sometimes need a few novelty days to adjust to a new prescription; however, problems should be reported, because the glasses may need to be rechecked.contact One, he didn''t think they were available from any other source," "and two, he had heard they weren''t as highly controlled as those contact dispensed through doctors."Neither assertion is true. got on the Internet and found her lenses on several Web sites for $35.95 for a box of six pairs. (Her doctor was charging $50 a box.) says her doctor told her that lenses offered by places like may have failed manufacturers'' quality checks. Bausch contacts and other lensmakers say there''s no difference in quality between the lenses sold through doctors and those lenses sold directly to consumers. STATES CRACK DOWN. Attorneys general in 32 states have sued the novelty American Optometric Association and two of the top contact-lens manufacturers contact (Vistakon, a division of contacts, and Bausch), alleging that the AOA tried to get manufacturers to agree to selllenses only through optometrists lenses or other eye-care professionals. novelty The attorneys general say they also have evidence that doctors agreed to withhold prescriptions from people who sought to buy lenses from other sources, despite the fact that at least 22 states have laws requiring eye doctors contact to give out contact-lens prescriptions lenses upon request.Although the AOA says patients should be able to buy their lenses anywhere, the organization novelty has reservations about mail-order purchases. "The difficulty when someone goes through mail contact order is lenses that they don''t come back for regular checkups," says AOA president Dr. Harvey Hanlen.
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