Which of the following is correct regarding the blind spot

Asked by admin @ in Science viewed by 280 People

Which among the following is correct regarding blind spot

1 It has only cone cells 2 It has only red cells 3 It consists of both cones and rods 4 It has no sensory cells​

Answered by admin @


Answer:

Hope this helps

Explanation:

Rods and cones are the secondary photoreceptors that are present buried under the layer of blood vessels and nerve fibres throughout the retina. Option C is incorrect. Rods are the light sensitive cells that lack colour discrimination and are almost exclusively present at the outermost edges of retina. Option A is incorrect. Fovea is the small depression in the retina opposite the lens and contains only cones. Option B is incorrect. Optic nerve, a bundle of nerve fibres, passes the sensory information from rods and cones to brain. The point of exit of optic nerve from eye forms a “bind spot” in retina which is devoid of both rods and cones. This makes option D correct.


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