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For a normal eye, distance of near point...

For a normal eye, distance of near point from the eye is.

A

8.3 m

B

7.8 m

C

6.3 m

D

3.3 m

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The correct Answer is:
D
NA
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What happens to the image distance in the eye when we increase the distance of an object from the eye ?

Assertion: The image distance in the eye increases, when we increase the distance of an object from the eye. Reason: For normal eye, image distance in the eye is fixed, being equal to distance of retina from the eye lens. The focal length of the eye lens is changed on account of accommodation power of the eye.

For a normal eye, the far point is at infinity and the near point of distinct vision is about 25 cm in front of the eye. The cornea of the provides a converging power of about 40 dioptre and the least converging power of eye lens behind the cornea is about 20 dioptre . From this rough data, estimate the range of accommodation (i.e., the range of converging power of the eye lens) of a normal eye.

The distance of the eye lens from the retina is x. For a normal eye, the maximum focal length of the eye lens

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