Question

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​

Answer 1

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.