visual impairment
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| Noun | 1. |  visual impairment - impairment of the sense of sight amaurosis - partial or total loss of sight without pathology of the eye; caused by disease of optic nerve or retina or brain amblyopia - visual impairment without apparent organic pathology ametropia - (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia aniseikonia - visual defect in which the shape and size of an ocular image differ in the two eyes anorthopia - distorted vision in which straight lines appear curved aphakia - absence of the natural lens of the eye (usually resulting from the removal of cataracts) color blindness, color vision deficiency, colour blindness, colour vision deficiency - genetic inability to distinguish differences in hue diplopia, double vision - visual impairment in which an object is seen as two objects; "diplopia often disappears when one eye is covered" disability, disablement, handicap, impairment - the condition of being unable to perform as a consequence of physical or mental unfitness; "reading disability"; "hearing impairment" day blindness, hemeralopia - inability to see clearly in bright light hemianopia, hemianopsia - blindness in one half of the visual field of one or both eyes quadrantanopia - blindness in one fourth of the visual field metamorphopsia - a defect of vision in which objects appear to be distorted; usually due to a defect in the retina moon blindness, night blindness, nyctalopia - inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder photoretinitis - damage to the retina resulting from exposure of the eye to the sun without adequate protection detached retina, detachment of the retina, retinal detachment - visual impairment resulting from the retina becoming separated from the choroid in the back of the eye; treated by photocoagulation scotoma - an isolated area of diminished vision within the visual field tunnel vision - visual impairment involving a loss of peripheral vision xanthopsia - visual defect in which objects appear to have a yellowish hue; sometimes occurs in cases of jaundice |
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