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NEARSIGHTED? NEED READING GLASSES? New developments in lens technology ensure a solution to almost every vision problem. Talk to your eye doctor about what''s available (costs vary).Rigid gas-permeables Recommended for those with high degrees of corneal astigmatism, RGPs are firm plastic lenses with microscopic slits that allow more oxygen to reach the eye. RGPs have a greater resistance to bacteria because they don''t contain water. Improved extended-wear materials also guarantee greater durability, sharper vision, comfort and cheaper maintenance costs. Allow yourself a week or two to get used to these slightly stiff lenses.Bifocals contacts These contact correct presbyopia, a kind of farsightedness that usually occurs around age 40. There are two types: Another type of multifocal, a trifocal, has an area in-between that corrects for intermediate disposables distances (usually about 28 in). Conventional bifocals and trifocals have visible lines between the areas of different correction; however, lenses where the correction gradually changes from one area to the other, without visible lines, contacts have been available since the 1970s. Such lenses are sometimes called progressives or no-line bifocals.To be suitable for lenses lenses, a material must be transparent, without bubbles, and have a high index of refraction. The greater the index of refraction, the thinner disposables the lens can be. Lenses are made from either glass or plastic contacts (hard resin). The advantage of plastic is that it is lightweight and more impact resistant disposables and contacts than glass. The advantage of glass is that disposables it is scratch resistant and provides the clearest possible vision. The lenses Council reports that 26 million Americans wear contact. Among lenses wearers, approximately 80% wear the soft type and 18% wear rigid gas-permeable contacts lenses. The Council disposables reports that about 11% of lenses wearers, approximately 2.8 million people, are under 18.InfantsThere are few instances when corrective lenses--lenseses or contacts--are prescribed for infants. However, when an infant develops cataracts contacts , a condition known as infantile aphakia, contact may be prescribed following surgery. In 1993, the Journal of the American Medical Association reported disposables that contact were safe and effective for use with infants following cataract surgery. Routine care of the lenses was easily learned by the baby''s parents or caregivers.
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