Electric signals from the retina to the brain are conveyed by_

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Ciliary muscles

Blind spot

Optic nerves

Pupil

answer is C.

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Detailed Solution

Electric signals from the retina to the brain are conveyed by Optic nerves.
The human eye has various parts which perform various tasks so that we can see objects in front of us clearly. Optic nerves are responsible for sending signals from the retina to the brain, and then the brain reads the signals, so we can see objects clearly.
Ciliary muscles adjust the focal length of our eyes depending on the distance of the object.
A blind spot is that area of the optic disk in which there are no photoreceptors. This spot is insensitive to the light and does not produce any image.
The pupil is the centre of the eye and is responsible for the colour of the eyes. It expands in low light and contracts in bright light.

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