What Is Defective Color Vision?
A formal medical term synonymous with Color Vision Deficiency (CVD) or color blindness, describing the inability of the eye to accurately differentiate between all colors.
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Root Cause
Results from a malfunctioning or absence of one or more types of cone photoreceptor cells in the retina.
Classification
Ranges from mild anomalies (like reduced sensitivity to green) to severe conditions like dichromacy (only two functioning cone types) or achromatopsia.
Heredity
The most common forms (red-green) are inherited via a recessive gene on the X chromosome, making it far more prevalent in males.
How does it affect art appreciation?
Individuals with CVD may still appreciate art, focusing more on luminosity, contrast, and form rather than specific hue differences.
Is it considered a disability?
While it presents significant challenges in tasks requiring color coding (like electronics or traffic signals), it is not typically classified as a legal disability.
What is the most common form?
Deuteranomaly (a mild form of red-green deficiency) is the most common type, affecting about 5% of males.