what are hypermetropia and myopia what are their cause how are they recified
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Myopia :- In this defect, the eye can see nearby objects clearly but the distant object appear indistinct.
reasons:- 1.the curvature of the cornea and th eye lens increases. the muscles near the eye cannot relax so that the converging power remains large
rectification:- by using concave lenses
hypermetropia:- In this defect, the eye can see distant objects clearly but the appear object appear indistinct.
reasons:- due to dncrease in distance between lens and retina
rectification:- by using convex lenses
reasons:- 1.the curvature of the cornea and th eye lens increases. the muscles near the eye cannot relax so that the converging power remains large
rectification:- by using concave lenses
hypermetropia:- In this defect, the eye can see distant objects clearly but the appear object appear indistinct.
reasons:- due to dncrease in distance between lens and retina
rectification:- by using convex lenses
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