Myopia - Presbyopia
|1.||This problem of vision arises due to slight elongation of eyeball or curved lens.||In this problem, the near point of aged people recedes. Also, ciliary muscles lose the capacity to change the focal length ofthe eye lens.|
|2.||In this defect, human eye can see nearby objects distinctly but unable to see distant objects clearly.||In this defect, aged people find it difficult to see nearby objects comfortably and clearly. Sometimes they are unable to see nearby as well as distant objects clearly.|
|3.||This defect can be corrected using concave lens of suitable focal length.||This defect can be corrected using bifocal lens in which concave lens is useful for distinct vision and convex lens is useful for near vision.|
Concept: Eye Defect and Its Correction: Presbyopia
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