Nyctalopia

View the Eye Diseases and Conditions Slideshow Pictures

Medical Definition of Nyctalopia

Nyctalopia: Night blindness, impaired vision in dim light and in the dark, due to impaired function of certain specialized vision cells (the rods) in the retina.

"Nyctalopia" comes from the Greek "nyct" (night) + "aloas" (obscure or blind) + "opsis" (vision). Nyctalopia is also called day sight, nocturnal amblyopia, and nyctanopia.


Quick GuideCommon Eye Problems and Infections

Common Eye Problems and Infections

Subscribe to MedicineNet's General Health Newsletter

By clicking Submit, I agree to the MedicineNet's Terms & Conditions & Privacy Policy and understand that I may opt out of MedicineNet's subscriptions at any time.

Reviewed on 5/13/2016

Health Solutions From Our Sponsors