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 ?
Overall, nearsighted people were about 90 per cent more likely to also develop open-angle glaucoma, with those who had higher levels of myopia appearing to be at higher risk of glaucoma as well.
Nearly one out of five Asian-American children in the study was nearsighted, and an equal percentage of white children was farsighted.
Fifty-one percent of nearsighted patients obtained 20/16 vision or better, 70 percent obtained 20/20 or better, and 95 percent obtained 20/40 or better (the vision standard for receiving a driver's license in most states), according to recent clinical data.
1) Nineteen percent of the patients, including many that were operated on twice, remain nearsighted.
4% who had completed less than eight years of formal study were nearsighted, while 19.
The warning signals flashing at Robins headquarters were enough to blind the most nearsighted freight train conductor.
Nearsightedness has increased steadily in North America and Europe in recent decades, with one-third of adults in the United States now nearsighted.
Patients should be nearsighted (myopic) and NOT currently wearing contact lenses.
I am very nearsighted, am 89 years old, and do a good deal of reading without difficulty.
It is a special election that reflects the nearsighted agenda of special interests and misses the mark on issues that truly matter to California.
Nearsighted people, those who struggle to see far away things, get a new look at life.