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What is meant by presiopia and hypermetropia mention two cause due to which presiopia and hypermetropia occurs. explain how it is corrects. defination and

correction cause.


Hyper metropia is a situation where people cannot  see the objects which are placed near.
cause damage to iris.
genetic problems.
correction usin bi-convex lens.

presbiopia occurs due to oldage.
it causes vision defects of far sightedness
correction according to defect..... bi-convex or concavo-convex
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