nearsightedness


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nearsightedness

or

myopia,

defect of vision in which far objects appear blurred but near objects are seen clearly. Because the eyeball is too long or the refractive power of the eye's lens is too strong, the image is focused in front of the retina rather than upon it. Corrective eyeglasseseyeglasses
or spectacles,
instrument or device for aiding and correcting defective sight. Eyeglasses usually consist of a pair of lenses mounted in a frame to hold them in position before the eyes.
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 with concave lenseslens,
device for forming an image of an object by the refraction of light. In its simplest form it is a disk of transparent substance, commonly glass, with its two surfaces curved or with one surface plane and the other curved.
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 compensate for the refractive error and help to focus the image on the retina. Hard corneal contact lenses or soft hydrophilic contact lenses are another option, usually offering better acuity and peripheral vision than do eyeglasses. (Contact lenses may be troublesome for people who tend to get eye infections or have hand tremors, however.) Nearsightedness can also be corrected by using laser cornea surgery and a device called a microkeratome to flatten the eye, or by surgically implanting a corrective lens behind the iris.

nearsightedness

[′nir¦sīd·əd·nəs]
(medicine)
References in periodicals archive ?
This trend could change now that much lower doses of atropine appear to offer the similar benefit in reducing nearsightedness progression, without the side effects.
As long as correction of nearsightedness and some forms of astigmatism are the only approved uses for the laser, the keycards will allow you to load software only for those procedures.
For more information about apl's lens procedure for nearsightedness, please visit www.
In certain developed parts of East Asia, nearsightedness is skyrocketing, with the prevalence of myopia now at an estimated 80 to 90 percent of the population.
Nearsightedness -- also known as myopia -- is the most common human eye disease in the world.
Since there is such a huge genetic influence that causes nearsightedness, a lot of parents have this tremendous feeling of guilt about their child being nearsighted,'' says McDonnell.
To further analyze the association between myopia development and education, researchers at the University Medical Center in Mainz, Germany examined nearsightedness in 4,658 Germans ages 35 to 74, excluding anyone with cataracts or who had undergone refractive surgery.
Nearsightedness - also known as myopia - is the most common human eye disease in the world.
Scientists in the United Kingdom have found that myopia, or nearsightedness, is predominantly hereditary, and they're beginning to unravel the genetic mechanism that causes the vision problem.
In other words, if there is a history of nearsightedness (myopia) in the family, the chance of a child having the same vision problem is greater than a child whose family has no history of problems.
ATLANTA -- LASIK surgery to correct nearsightedness and farsightedness continues to be the most popular elective surgery in the United States.
Washington, May 2 ( ANI ): Two new studies add to the growing evidence that nearsightedness in children could be prevented or minimized by spending time outdoors.