nyctalopia

noun Ophthalmology.

1. night blindness.
2. hemeralopia.

noun

1. inability to see normally in dim lightNontechnical name: night blindness Compare hemeralopia

n.

1. A condition of the eyes in which vision is normal in daylight or other strong light but is abnormally weak or completely lost at night or in dim light and that results from vitamin A deficiency, disease, or hereditary factors.night blindness