nyc·​ta·​lo·​pia | \ ˌnik-tə-ˈlō-pē-ə How to pronounce nyctalopia (audio) \

Definition of nyctalopia

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Nyctalopia comes to us from the Latin word nyctalops, which means "suffering from night blindness." It is ultimately derived from the Greek word nyktalops, which was formed by combining the word for "night" ("nyx") with the words for "blind" and "eye" ("alaos" and "ōps," respectively). English speakers have been using "nyctalopia" to refer to reduced vision in faint light or at night since the 17th century. We added the somewhat more pedestrian "night blindness" to the lexicon in the 18th century.

First Known Use of nyctalopia

1684, in the meaning defined above

History and Etymology for nyctalopia

New Latin, from Latin nyctalops suffering from night blindness, from Greek nyktalops, from nykt-, nyx night + alaos blind + ōp-, ōps eye — more at night, eye

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The first known use of nyctalopia was in 1684

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Cite this Entry

“Nyctalopia.” Dictionary, Merriam-Webster, Accessed 2 Mar. 2021.

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nyc·​ta·​lo·​pia | \ ˌnik-tə-ˈlō-pē-ə How to pronounce nyctalopia (audio) \

Medical Definition of nyctalopia

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