Definition

1. Noun:
   • A visual impairment characterized by the inability to see clearly in bright light: Hemeralopia is a condition of the eyes where vision is normal or near-normal in dim light but becomes poor, blurry, or uncomfortable in well-lit conditions or daylight.

Usage Examples

• Noun:
  • The patient's hemeralopia made driving during the day particularly difficult.
  • Sunglasses can help alleviate some discomfort for individuals with hemeralopia.

Advanced Usage

• Medical Context: Hemeralopia is often discussed in contrast to nyctalopia (night blindness). While nyctalopia is poor vision in low light, hemeralopia specifically refers to poor vision in bright light.
  • The ophthalmologist diagnosed the condition as hemeralopia after noting the patient's severe photophobia.

Variants and Related Words

• Photophobia (n): An abnormal sensitivity or intolerance to light, which is a common symptom of hemeralopia and other conditions.
  • The hemeralopia was accompanied by intense photophobia.

Synonyms

• Day blindness: A less formal, descriptive synonym for hemeralopia.

Notes on Meaning

• Hemeralopia is a specific medical term. It is not a general term for any vision problem in light but refers to a particular type of visual dysfunction. It is sometimes confused with, but is the opposite of, "nyctalopia" (night blindness).

Noun

1. inability to see clearly in bright light