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No image formation occurs on blind- spot of retina because

1. It is not present of the optical axis of the eye.
2. Here, cones and rods are absent.
3. On this part, only cones are present
4. The nerve fibres of this region do not contribute in the formation of optic chiasma.

Correct answer: Here, cones and rods are absent.

Solution

The blind spot corresponds to the optic disc, where the optic nerve leaves the eye. This area has no rods or cones, so no image can be formed there.

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