| has gloss | (noun) impairment of the sense of sight
vision defect, visual disorder, visual impairment, visual defect |
| has gloss | eng: Visual impairment (or vision impairment) is vision loss (of a person) to such a degree as to qualify as an additional support need through a significant limitation of visual capability resulting from either disease, trauma, or congenital or degenerative conditions that cannot be corrected by conventional means, such as refractive correction, medication, or surgery. This functional loss of vision is typically defined to manifest with # best corrected visual acuity of less than 20/60, or significant central field defect, # significant peripheral field defect including homonymous or heteronymous bilateral visual, field defect or generalized contraction or constriction of field, or # reduced peak contrast sensitivity with either of the above conditions. |
| lexicalization | eng: vision defect |
| lexicalization | eng: visual defect |
| lexicalization | eng: visual disorder |
| lexicalization | eng: Visual Impairment |
| subclass of | (noun) the condition of being unable to perform as a consequence of physical or mental unfitness; "reading disability"; "hearing impairment"
handicap, impairment, disablement, disability |
| has subclass | (noun) partial or total loss of sight without pathology of the eye; caused by disease of optic nerve or retina or brain
amaurosis |
| has subclass | (noun) visual impairment without apparent organic pathology
amblyopia |
| has subclass | (noun) (ophthalmology) faulty refraction of light rays in the eye as in astigmatism or myopia
ametropia |
| has subclass | (noun) visual defect in which the shape and size of an ocular image differ in the two eyes
aniseikonia |
| has subclass | (noun) distorted vision in which straight lines appear curved
anorthopia |
| has subclass | (noun) absence of the natural lens of the eye (usually resulting from the removal of cataracts)
aphakia |
| has subclass | (noun) the state of being blind or lacking sight
blindness, cecity, sightlessness |
| has subclass | (noun) genetic inability to distinguish differences in hue
colour blindness, color blindness, colour vision deficiency, color vision deficiency |
| has subclass | (noun) visual impairment in which an object is seen as two objects; "diplopia often disappears when one eye is covered"
double vision, diplopia |
| has subclass | (noun) inability to see clearly in bright light
day blindness, hemeralopia |
| has subclass | (noun) blindness in one half of the visual field of one or both eyes
hemianopsia, hemianopia |
| has subclass | (noun) blindness in one fourth of the visual field
quadrantanopia |
| has subclass | (noun) a defect of vision in which objects appear to be distorted; usually due to a defect in the retina
metamorphopsia |
| has subclass | (noun) inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
night blindness, moon blindness, nyctalopia |
| has subclass | (noun) damage to the retina resulting from exposure of the eye to the sun without adequate protection
photoretinitis |
| has subclass | (noun) visual impairment resulting from the retina becoming separated from the choroid in the back of the eye; treated by photocoagulation
detached retina, detachment of the retina, retinal detachment |
| has subclass | (noun) an isolated area of diminished vision within the visual field
scotoma |
| has subclass | (noun) visual impairment involving a loss of peripheral vision
tunnel vision |
| has subclass | (noun) visual defect in which objects appear to have a yellowish hue; sometimes occurs in cases of jaundice
xanthopsia |