day-blindness

A person with day-blindness wears sunglasses on a bright afternoon.

Definition

1. Noun (uncountable):
   • Medical condition: "day-blindness" refers to a visual disorder in which vision is impaired in bright light, also known as hemeralopia. This is the opposite of night-blindness (nyctalopia), where vision is poor in dim light.

Usage Examples

• (A medical condition affecting vision in bright conditions.)
• (A cause or explanation of the condition.)

Advanced Usage

• "suffer from day-blindness": to experience the symptoms of this condition.

  • He suffers from day-blindness and must wear dark glasses even on cloudy days. (He has difficulty seeing in any bright environment.)

• "hemeralopia": the technical medical term for day-blindness.

  • The ophthalmologist explained that hemeralopia, or day-blindness, is often linked to problems with the cone cells in the retina. (The formal name for the condition.)

Variants and Related Words

• Day-blind (adj): describing a person or animal affected by day-blindness.

  • The day-blind owl avoids hunting during the daytime. (The owl cannot see well in bright light.)

• Night-blindness (n): the opposite condition, where vision is poor in low light.

  • While day-blindness impairs vision in brightness, night-blindness causes difficulty in darkness. (A related but contrasting condition.)

Synonyms

• Hemeralopia: the medical term for day-blindness.
  • Hemeralopia is a rare condition that can be inherited. (The clinical synonym.)

Related Idioms

• (No common idioms are associated with "day-blindness," as it is a technical medical term.)