Research on rods and cones has revealed that:
A) the outer edges of the retina, which are responsible for peripheral vision, contain only cones.
B) rods are more effective than cones in distinguishing different wavelengths of light.
C) the centre of the retina contains a mixture of about 75% rods and 25% cones.
D) there are about 120 to 125 million rods and about 7 or 8 million cones in the retina.

Question

Quizplus · Accepted Answer

Research has shown that the retina contains about 120 to 125 million rods and about 7 or 8 million cones. The outer edges of the retina, responsible for peripheral vision, contain mostly rods while the centre of the retina contains mostly cones with a mixture of about 75% rods and 25% cones. Rods are more effective than cones in low light conditions and are responsible for night vision, while cones are responsible for color vision and work best in bright light conditions.

Research on Rods and Cones Has Revealed That