Question

Colour blindness is related with a defect in

• A. Rods
• B. Cones
• C. Eye muscle
• D. All of the above

Answer 1

The correct option is B Cones

Rods cells detect the light and dark conditions. They are very sensitive to low light levels. Cone cells detect and differentiate color. There are three types of cones that see colour. The L-cone detects long wavelength light (yellow and red), the M-cone detects medium wavelength light (green) and the S-cone detects short wavelength light (blue). Absence, non-functioning, or malfunctioning of any of these cone cells results in colour blindness. Eye muscles are involved in eye movement not in colour detection. Correct answer is B.