Question

The ability of the eye to see in the dark is due to the production of a purple pigment known as

Answer 1

The ability of the eye to see in the dark is due to the production of purple pigment called rdopsin of rod cells present on retina
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Answer 2

Rhodopsin is the answer here.

Rhodopsin which is also called as a visual purple since it is a light-sensitive type of receptor and it has a massive involvement of protein that is used in visual phototransduction.

This was named only after the Greeks a symbol for rose, mainly because of its pink color."