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Q.

What are the possible reasons that cause hypermetropia?


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a

Excessive curvature of the eye

b

The focal length of the eye lens is too long

c

minimal curvature of the eye

d

Increase in the size of the eye lens 

answer is B.

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Detailed Solution

The possible reason for hypermetropia is the focal length of the eye lens turns too long.
There are two possible causes of hypermetropia.
(i) The focal length of the eye lens is too long, which is due to the thinning of the eye lens. So, the image of the nearby objects is formed behind the retina.
(ii) Shortening or decrease in size of the eye lens: This leads to a decrease in the distance of the retina from the eye lens. As a result, again, the image is formed behind the retina.
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