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Write the importance of ciliary muscles in the human eye. Name the defect of vision that arises due to gradual weakening of the ciliary muscles in old age.

What type of lenses are required by the persons suffering from this defect to see the object clearly.


1.ciliary muscles  controls accommodation for viewing objects at varying distances and regulates the flow of aqueous humour into Schlemm's canal.
3.eye glasses with bifocal or progressive addition lenses (PALs). 
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