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What is
Near-Sighted? Do they see only near? |
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A nearsighted eye sees near objects within a certain range very clearly while distance vision appears blurry at all times.
Most often caused when the eyeball is too long for the focusing power of the lens and cornea, nearsightedness creates an overpowered eye which causes images to reach true focus in front of the retina. Correction requires a "minus" lens to "weaken" the eye optically to permit clear distance vision. |
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Nearsightedness is not considered a disease, but caused by a natural shift in the shape of the eye. If one or both parents are nearsighted, it is more likely their children will also be nearsighted. Some evidence suggests nearsightedness might also be brought on by doing too much close work over a prolonged period of time. Luckily, there are many ways to treat nearsightedness.
Eyeglasses can correct nearsightedness, and advancements in lens material have made glasses more comfortable than ever. At one time, severe nearsightedness required thick lenses that distorted the face, making the eyes look abnormally small, but this is no longer the case. Special lenses today can be so thin and light as to hardly be noticeable, while correcting nearly any grade of nearsightedness. |
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