What is presbyopia write two causes of this defect name the type of lens which can be used in this?
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1,presbyopia is caused due to the stiffening of ciliary muscle which results in loosening the flexibility of eyelens and this leads to decrease in power of accommodation .
2, presbyopia also cause due to hardening of eye lens which occurs due to aging in human beings.
it can be cured by using bifocal eyeglasses.
2, presbyopia also cause due to hardening of eye lens which occurs due to aging in human beings.
it can be cured by using bifocal eyeglasses.
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