Q.Name the point on Retina where both rods and cones are absent.

Blind Spot of the Retina

There is a small patch in each of your eyes where you are literally blind — you just never notice it. This is the blind spot, and far from being a defect in design, it is the unavoidable consequence of how the eye is wired. Understanding it teaches you exactly how the retina and optic nerve are arranged.

The WHY — where the "cable" leaves the eye

The retina is lined with light-detecting photoreceptors — rods and cones. But the nerve signals they generate must exit the eye to reach the brain. They gather into the optic nerve, which passes out through the retina at one point. At that exact spot, there is no room for photoreceptors — so light falling there cannot be detected. This point is the blind spot (also called the optic disc).

Key facts

• Location: where the optic nerve leaves the eyeball.
• No rods and no cones are present there.
• No image is formed on the blind spot.
• Blood vessels of the retina also enter/leave here.

Blind spot vs the sharpest spot

It helps to contrast it with the opposite region of the retina:

Why you don't notice it …