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Related to hemeralopia: nyctalopia


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

[New Latin hēmeralōpia, from Greek hēmeralōps, suffering from hemeralopia : hēmera, day + alaos, blind + ōps, eye; see nyctalopia.]

hem′er·a·lop′ic (-lŏp′ĭk) adj.


(Pathology) inability to see clearly in bright light. Nontechnical name: day blindness Compare nyctalopia
[C18: New Latin, from Greek hēmeralōps, from hēmera day + alaos blind + ōps eye]
hemeralopic adj


(ˌhɛm ər əˈloʊ pi ə)

a condition in which vision is normal in the night or in dim light but is abnormally poor or wholly absent in the day or in bright light.
[1700–10; < Greek hēmeralōp-, s. of hēmerálōps suffering from day blindness (hēmér(a) day + ala(ós) blind + -ōps having eyes of the kind specified; see Cyclops) + -ia; compare -opia]
hem`er•a•lop′ic (-ˈlɒp ɪk) adj.


a condition of the eyes in which the sufferer can see clearly at night but has impaired vision during the day; day blindness.
See also: Eyes
the loss of sight in daylight. — hemeralopic, adj.
See also: Blindness
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hemeralopia - inability to see clearly in bright light
vision defect, visual defect, visual disorder, visual impairment - impairment of the sense of sight
References in periodicals archive ?
During two years study, 31 cases of progressive retinal atrophy (PRA) were recorded in dogs with typical history of initial nyctalopia followed by hemeralopia.
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.
La Sociedad General de Oftalmologia (Archivos 2002) manifiesta que nadie que actualmente lea u oiga los terminos nictalopia y hemeralopia, puede saber con certeza si el autor ha querido decir una cosa o su contraria, para concluir que: