Definition

1. Noun:
   • Colour vision deficiency: A genetic condition affecting the eyes, resulting in an inability to perceive differences between certain colours or hues. It is commonly known as colour blindness.

Usage Examples

• Noun:
  • Colour vision deficiency is more common in men than in women.
  • People with colour vision deficiency may have difficulty distinguishing red from green.
  • The test is designed to screen for various types of colour vision deficiency.

Advanced Usage

• "to have colour vision deficiency": To be affected by this condition.
  • He has a mild form of colour vision deficiency.
• "diagnosis of colour vision deficiency": The formal identification of the condition.
  • An optometrist can provide a diagnosis of colour vision deficiency.

Variants and Related Words

• Colour blindness (n): The common, informal term for colour vision deficiency.
  • Colour blindness does not mean seeing the world in black and white.
• Deuteranopia (n): A specific type of red-green colour vision deficiency.
• Protanopia (n): Another specific type of red-green colour vision deficiency.
• Tritanopia (n): A rare blue-yellow colour vision deficiency.

Synonyms

• Colour blindness: The most common synonym.
• Daltonism: An older, less common term for red-green colour vision deficiency.

Related Phrases

• Colour vision test (n): A test used to assess colour perception.
  • The Ishihara plates are a well-known colour vision test.
• Colour deficient (adj): Describing a person with this condition.
  • Colour deficient individuals often develop strategies to cope.

Noun

1. genetic inability to distinguish differences in hue