Explain Presbyopia? Give its causes and how is it corrected.
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long-sightedness caused by loss of elasticity of the lens of the eye, occurring typically in middle and old age.
Correction is done by using bifocal lenses
Correction is done by using bifocal lenses
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Hey friend your answer is here...
Presbyopia(old sight) -
. . . . . . . . . . . .some time a person may suffer from both myopia and hypermetropia. This defect called presbyopia.
such people often use bifocal lens in which one part of the lens act as concave and other part as a convex lens..
Presbyopia(old sight) -
. . . . . . . . . . . .some time a person may suffer from both myopia and hypermetropia. This defect called presbyopia.
such people often use bifocal lens in which one part of the lens act as concave and other part as a convex lens..
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