Medical term:

hemeralopia

[hem″er-al-o´pe-ah]

defective vision in a bright light; called also day blindness and night sight.

hem·er·a·lo·pi·a

(hem'ĕr-ăl-ō'pē-ă),

Inability to see as distinctly in a bright light as in reduced illumination; seen in patients with impaired cone function.

Synonym(s): day blindness, hemeranopia, night sight

[G. hēmera, day, + alaos, obscure, + ōps, eye]

Farlex Partner Medical Dictionary © Farlex 2012

hemeralopia

(hĕm′ər-ə-lō′pē-ə)

A visual defect characterized by the inability to see as clearly in bright light as in dim light.

hem′er·a·lop′ic (-lŏp′ĭk) adj.

hem·er·a·lo·pi·a

(hem'ĕr-ă-lō'pē-ă)

Inability to see as distinctly in a bright light as in reduced illumination; seen in patients with impaired cone function.
Synonym(s): day blindness.

[G. hēmera, day, + alaos, obscure, + ōps, eye]

hemeralopia

Inability to see as well in bright light as in dim. From the Greek hemera , day, alaos , blind and ops an eye.

hemeralopia

Term used to mean either night blindness in which there is a partial or total inability to see in the dark associated with a loss of rod function or vitamin A deficiency; or day blindness in which there is reduced vision in daylight while vision is normal in the dark. Syn. nyctalopia (this term is only synonymous with night blindness); night sight (this term is only synonymous with day blindness). See girate atrophy; congenital stationary night blindness; choroideremia; Oguchi's disease; retinitis pigmentosa.

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