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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 contacts for those with high degrees of corneal astigmatism, RGPs are firm plastic lenses with microscopic slits that allow more oxygen biforcal to reach the eye. RGPs have a greater resistance to bacteria because they don''t contain water. Improved extended-wear materials contacts also guarantee greater durability, sharper vision, comfort and cheaper maintenance costs. Allow yourself a week biforcal or two to get used to these slightly stiff lenses.Bifocals These contact correct presbyopia, a kind of farsightedness contacts that usually occurs around age 40. There are two types: (Lenses made from polycarbonate, the same type of plastic used for the space shuttle windshield, are about 50 times stronger than other lens materials.) Also, people at risk of receiving electric shock should avoid metal frames.People biforcal employed in certain occupations may be prohibited from wearing contact, or may be required to wear safety eyewear contacts over the contact. Some occupations, such as construction or auto repair, may biforcal require safety lenses and safety frames. Physicians and employers should be consulted for recommendations. Description Eyes are examined by optometrists (O.D.) or by ophthalmologists (M.D. or D.O.--doctor of osteopathy). Prescriptions, if necessary, are then given to patients for glasses. The glasses are generally made by an optician. A separate lenses-fitting exam is necessary if the contacts patient wants contact, because an lenses prescription is not the same as a lenses prescription. They biforcal are flatter and lighter than conventional lenses.There are many lenses and lens-coating options for individual needs, including coatings that block the ultraviolet (UV) light or UV contacts and blue light biforcal which have been found to be harmful to the eyes. Such coatings contacts are not needed on polycarbonate lenses, which already have UV protection. UV coatings are particularly important on sunglasses biforcal and ski goggles. Sunglasses, when nonprescription, should be labeled with contacts an indication that they block out 99-100% of both UV-A and UV-B rays. There are anti-scratch coatings that increase the surface hardness of lenses (an important feature when using biforcal plastic lenses) and anti-reflective (AR) coatings that eliminate almost all glare and allow other people to see the eyes of the wearer. AR coatings may be particularly helpful to people who use computers or who drive at night. Mirror coatings that prevent other people contacts from seeing the wearer''s eyes are also available. There is a whole spectrum of tints, from light tints biforcal to darker tints, used in sunglasses.
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