Definition

Noun: 1. Color blindness: A genetic condition, typically present from birth, that reduces a person's ability to see and distinguish between certain colors, particularly differences in hue. It is more common in males and is caused by an anomaly in the light-sensitive cells (cones) in the retina of the eye.

Usage Examples

• Noun:
  • His color blindness made it difficult for him to tell if the traffic light was red or green.
  • The most common form of color blindness is the inability to distinguish between red and green hues.
  • Designers should consider color blindness when choosing color schemes for charts and websites.

Advanced Usage

• "to be color blind": To have the condition of color blindness. This is the adjectival form describing a person.
  • He is color blind, so he sees the world in a different palette.
• "color-blind" (adjective): Can also describe policies, tests, or perspectives that deliberately ignore or do not discriminate based on race or skin color.
  • The company strives for a color-blind hiring process. (Note: This is a distinct, figurative meaning.)

Variants and Related Words

• Color blind (adjective): Describing a person with the condition or a policy that ignores race.
• Color vision deficiency (noun): A more precise and often preferred term for color blindness.
• Deuteranopia (noun): A specific type of red-green color blindness.
• Protanopia (noun): Another specific type of red-green color blindness.
• Tritanopia (noun): A rare type of blue-yellow color blindness.

Synonyms

• Color vision deficiency: The more clinical term.
• Daltonism: An older term, named after scientist John Dalton, who had the condition.

Related Phrases

• Color blindness test: A series of images (like Ishihara plates) used to diagnose the type and severity of color vision deficiency.
• Color blind glasses: Specialized eyewear designed to enhance color perception for some individuals with color blindness.

Noun

1. genetic inability to distinguish differences in hue