Question

What type of spectacles should be worn by a person having the defect of myopia as well as hypermetropia? How does it help?​

Answer 1

Answer:

1. in hypermetropia we need convex lens . Eye glasses with converging lenses provide the additional focussing power required for forming the image on the retina.
2. In myopia eye we need concave lens.A concave lens of suitable power will bring the image back on to the retina and thus the defect is corrected.

Explanation:

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Answer 2

Explanation:

●》in myopia a person can see nearby objects clearly but cannot see distant objects clearly.

●》in hypermetropia a person can see distance objects clearly but cannot see nearby objects clearly.

●》a person having the defects of myopia as well as hypermetropia should wear spectacles having bifocal lenses in which upper part consists of concave lens and lower part consists of convex lens .