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Hyperopia (or more rarely, hypermetropia), also known as farsightedness or longsightedness, is a defect of vision caused by an imperfection in the eye (often when the eyeball is too short), causing inability to focus on near objects, and in extreme cases causing a sufferer to be unable to focus on objects at any distance. It is corrected by using eyeglasses with lenses of positive curvature (magnifying glasses).
See also myopia for a related but opposite condition.
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