A) change in the convexity of the lens
B) to and fro movement of the lens
C) to and fro movement of the retina
D) change in the refractive index of the eye fluid
Correct Answer: A
Solution :
The focusing in the eye is done by changing the Convexity of the lens through Ciliary Muscles. The Retina is a light sensitive layer at tile back of eye. The photosensitive cells in the retina called Rods and cones convert the incident light energy into signals which are carried to the brain by the Optic nerve.
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