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Q.

Function of optic nerve in human eye:


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a

Images are modified by the optic nerves.

b

Electric signals are generated on the retina and are carried by the optic nerve of the brain.

c

Image brightness is reduced by the optic nerve.

d

All of the above. 

answer is B.

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Detailed Solution

Concept: The optic nerve is located in the rear of the eye. The second cranial nerve is also known as cranial nerve II. This is the second of several cranial nerve pairs. The optic nerve's purpose is to transmit visual information from the retina to the brain's vision centers through electrical impulses.
The optic nerve exits the orbit (eye socket) via the optic tube and flows postero-medially into the optic chiasm, where the fibers from the temporal visual fields (the nasal hemi-retina) are partially severed in both eyes (cross-over).
So, the brain's optic nerve transmits electrical impulses to the retina.
The optic nerve's job is to transport electrical impulses from the retina to the brain's vision centers, carrying visual information.
Function of the optic nerve in the human eye is that electrical signals are generated on the retina and are carried by the optic nerve of the brain.
Hence, the correct option is 2.
 
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