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Common Refractive Vision Problems
August 16, 2007 | Author: admin | Filed under: Astigmatism
Common Refractive Vision Problems
By Randy Heavner
Three of the more common vision problems are referred to as refractive errors. A refractive error is basically an error in the focusing of light by the eye. The most common refractive errors include hyperopia (farsightedness), myopia (nearsightedness), and astigmatism (blurred vision due to corneal irregularities).
Hyperopia, or farsightedness results when light entering the eye focuses behind the retina instead of directly on it. This is often due to a cornea which is flatter than a normal eye. An individual with hyperopia will experience difficulty seeing objects that are close and may experience eye strain and headaches after reading or doing close work. The condition will generally worsen with age , as the eye loses its ability to compensate. Correction for hyperopia usually involves corrective eyeglasses, contact lens, or refractive laser eye surgery.
Myopia, or nearsightedness, occurs when the eye focuses in front of the retina as opposed to directly on it. This effect is generally caused by a cornea that is steeper than a normal eye. Typical symptoms are blurry distance vision which may make the reading of highway signs, blackboards, etc. difficult. It is estimated that as much as a third of the population may suffer from myopia. Correction for this disorder may be obtained with prescription eyeglasses, contact lens, or through refractive laser surgery.
Astigmatism occurs when the cornea is more oval, or football shaped, than spherical. The corneal surface may in addition have some areas which are flatter or steeper than others. Dependent upon the degree, symptoms of astigmatism may include distortion in areas of your field of vision, blurring of lines, eyestrain, and headaches. It may exist along with other refractive errors as well. Treatment is generally through prescription eyeglasses, contact lens, or refractive laser eye surgery.
Most refractive vision errors may be corrected with eyeglasses or contact lens. A more permanent solution for many individuals exists with a laser eye surgery procedure such as LASIK. In many cases a laser surgical procedure can eliminate the need entirely for glasses or contacts. In any case, it is of extreme importance that any and all vision problems be thoroughly assessed by a qualified opthamologist who can advise the best course of treatment.
For more information on vision problems and their correction, or to find a qualified lasik eye surgeon in your area visit us at http://www.lasersurgeryeyes.net
Article Source: http://EzineArticles.com/?expert=Randy_Heavner http://EzineArticles.com/?Common-Refractive-Vision-Problems&id=540506
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