from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The state or quality of being day-blind.

from The Century Dictionary and Cyclopedia

  • n. The common name for the visual defect by which objects are seen distinctly only by a dim light: the opposite of daysight.


Sorry, no etymologies found.


  • Hemeralopia (etymologically day-blindness, but by common usage meaning day-vision or night-blindness) is a symptom of a peculiar degenerative disease of the retina, called retinitis pigmentosa.

    Anomalies and Curiosities of Medicine


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