Question

The figure given below represents a defective eye.
a. Identify the defect and list any two causes of this defect.
b. How can it be corrected? Also, draw a ray diagram to represent the same.
ii) A person cannot see clearly any object placed beyond 50 cm from his eye. Calculate
the power of the lens which will help him to see distant object clearly,
OR​

Answer 1

a. myopia

causes of myopia :

• due to the elongation of the eyeball.
• due to decrease in the focal length of the eye lens.

b. myopia can be corrected by using a concave lens of suitable focal length in the spectacles of such a person.

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