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What is presbyopia? What causes presbyopia? How is presbyopia corrected |
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Answer» Catarat=>unlike coloured eyes....Surgery =>adjust the Retina Correctness=>bifocal lens two lens...see far object => cancave lens upper power(-)...near by object =>canvex lens lower power(+).... presbyopia_ .........Reason of defect: gradual weakening of ciliary muscles, thereby decreasing the flexibility of the eye lens. Presbyopia is the defect of vision due to which an old person cannot see the nearby objects clearly due to loss of power of accommodation of the eye..... |
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