what do u mean by presbyopia?
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the power of accommodation of the eye usually decreases with ageing for most people the near point gradually receds heavy they find it difficult to see nearby objects comfortable and distinctly without corrective a glasses this defect is called presbyopia
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Presbyopia is said to be an old age hypermetropia,it is caused due to weakening of ciliary muscles and also can say according to age it occurs the corrective lens used actually is bifocal lenses..
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