Q.

Is it true that the iris and pupil are insensitive to light?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
The human eye enables us to see this wonderful and colourful world. The image formed by the retina of the eyes is real and inverted, which is then sent to the brain with the help of optic nerves and then finally, we can see the objects around us, the part of the eye which is insensitive to the light is the blind spot which is present at the junction of the retina and optic nerve.
The correct statement would be that the blind spot is a portion of the eye which is insensitive to light.
 
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