Question

why rod and cone cells present at the back of retina
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Answer 1

Answer:

Rods are responsible for vision at low light levels (scotopic vision). They do not mediate color vision, and have a low spatial acuity. Cones are active at higher light levels (photopic vision), are capable of color vision and are responsible for high spatial acuity.

Answer 2

• The retina, which lines the inside of the eyeball and is light-sensitive, is a light-sensitive portion of the eye.
• Cones, which detect the colours red, green, and blue, are located in the rear of the retina.
• Rods, which are far more light-sensitive than cones but color-blind, are strewn about amid the cones.

• Low-light vision is controlled by rods (scotopic vision). They have poor spatial acuity and do not mediate colour vision.

• Cones are responsible for great spatial acuity and are active at higher light levels (photopic vision).
• They also have colour vision.
• Cones are the only ones living in the center fovea.
• Short-wavelength sensitive cones (S-cones), middle-wavelength sensitive cones (M-cones), and long-wavelength sensitive cones (L-cones) are the three kinds of cones.