hemeralopia


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to hemeralopia: nyctalopia

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

hemeralopia

(hĕm′ər-ə-lō′pē-ə)
n.
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.
References in periodicals archive ?
Table 1 Eye-related photophobia Disorder Additional signs/symptoms Mechanism Achromatopsia Reduced vision, Stimulation of light hemeralopia, nystagmus, sensitive cells in retina iris dysfunction and iris Aniridia Nystagmus, low vision, Reduction in control of buphthalmos, cataract light entering eye.
Los terminos nictalopia y hemeralopia deben ser eliminados en las expresiones actuales, para evitar confusiones.
In dogs, ERG is mostly used for pre-operative evaluation of retinal function before cataract extraction as many dogs may be simultaneously affected with both progressive retinal degeneration (atrophy) and cataract, for characterization of retinal disorders in which no ophthalmoscopic abnormalities are evident such as glaucoma, retinal dysplasia, degenerative retinopathies, optic nerve hypoplasia, hemeralopia, Sudden Acquired Retinal Degeneration (SARD) and differentiating between retinal and post-retinal causes of blindness viz.