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Setting Lasik aside, consider the variety of contact lens designs for usual and special needs. They are now available in bifocal prescriptions. And, sensitive eyes even have the option of extra thin lenses. There are soft, comfortable lenses that you can discard after a day or a month, and rigid gas permeable lenses that can last years and provide sharper, clearer vision than soft lenses. Soft lenses absorb moisture and conform to the eye with more ease. They are cheaper initially than rigid lenses, but more expensive in the long run. Some patients count this cost when comparing with Lasik. Rigid lenses are more durable, but take more getting used to. They are more resistant to buildup of deposits. Lasik deals with astigmatism. With rigid contacts, you can differentiate between the left and right eyes and select toric lenses for astigmatism. Seven-day continuous wear lenses and 30-day continuous wear lenses have recently been approved by the FDA. Lasik uses surgery to change the shape of the cornea. Ortho-K uses rigid gas permeable contact lenses to train the shape of the cornea. In both, this improves the eye's ability to refract light and focus. While not a permanent result, with continued use, a person's vision may improve drastically, up to 20/40 or even 20/20 vision. In the beginning of the Ortho-K therapy, the contact lenses are worn about eight hours each day. After Lasik, vision improvement occurs in days. With Ortho-K, as the cornea changes shape over the weeks, improving the vision, the lenses are worn less frequently. Wearing time shortens to a few hours at a stretch every few days. Stopping the use of the Ortho-K lenses causes the corneas to revert to their original state. Occasionaly, the effects of Lasik may fade, too. Clarity of vision may fluctuate, and it may take several months to change the vision measurably. Accelerated Ortho-K therapy may be used to get the desired effect more rapidly. People with low levels of nearsightedness and/or slight astigmatism are the best candidates for Ortho-K. If Lasik or contact lenses are not for you, there is another alternative. Sticking with your eyeglasses may be the choice you need make. Eyeglass frames are more durable and flexible than ever. Lenses are lighter, stronger, more scratch resistant. New options for glasses include tinting that changes more rapidly, progressive bifocal lenses, anti-reflective coatings, UV protection and greater impact resistance. Some advantages to this option are less expense than contact lenses or Lasik surgery, greater ease in changing your mind, and fashion-forward styling. The greatest benefit may be the guarantee that the good eyesight they have provided to you for years can continue indefinitely. If you cannot have Lasik surgery now, or even if you never choose to have that procedure, these are viable, safe, money-saving choices. Even if you decide to have Lasik surgery at some future date, choosing contact lenses, Ortho-K therapy, or eyeglasses can keep you going until you make that decision. Article Source: http://www.BharatBhasha.com Article Url: http://www.bharatbhasha.com/health.php/68475 Article Added on Thursday, December 6, 2007 |
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