Imperfect eyes: An error in refraction is imbalance between the amount of light-bending (refraction) an eye needs and what it has. A perfectly refracted eye bends the light the exact amount to focus on the retina. Most eyes are not perfect and need to lessen (in nearsightedness) or increase (in farsightedness) the amount of bending. This is done with glasses, contacts or surgery.
Answered 12/10/2013
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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