Question

which of the following pathological conditions is complete color blindness?
a monochromatism
b astigmatism
c achromatopsia
d retinitis pigmentosa

Explanation:

• Monochromatism: Refers to the ability to see only in black, white, and shades of gray, which is complete color blindness.
• Astigmatism: A refractive error that causes blurred vision, not related to color perception.
• Achromatopsia: A type of color blindness, but usually refers to partial color vision deficiency rather than complete.
• Retinitis pigmentosa: A group of genetic disorders that affect the retina and cause progressive vision loss, not specifically complete color blindness.

Answer:

A. monochromatism