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visual disorder

Definitions of visual disorder
  1. noun
    impairment of the sense of sight
    synonyms: vision defect, visual defect, visual impairment
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    types:
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    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)
    blindness, cecity, sightlessness
    the state of being blind or lacking sight
    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
    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
    legal blindness
    vision that is 20/200 or worse in both eyes (20/200 vision is the ability to see at 20 feet what a normal eye can see at 200 feet)
    dichromacy, dichromasy, dichromatism, dichromatopsia, dichromia
    a deficiency of color vision in which the person can match any given hue by mixing only two other wavelengths of light (as opposed to the three wavelengths needed by people with normal color vision)
    monochromacy, monochromasy, monochromatic vision, monochromatism, monochromia
    complete color blindness; colors can be differentiated only on the basis of brightness
    myopia, nearsightedness, shortsightedness
    (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred
    astigmatism, astigmia
    (ophthalmology) impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people
    anopia
    sightlessness (especially because of a structural defect in or the absence of an eye)
    farsightedness, hypermetropia, hypermetropy, hyperopia, longsightedness
    abnormal condition in which vision for distant objects is better than for near objects
    snow-blindness, snowblindness
    temporary blindness caused by exposure to sunlight reflected from snow or ice
    annular scotoma
    a circular scotoma surrounding the center of the field of vision
    central scotoma
    a scotoma that involves the fixation point
    hemianopic scotoma
    a scotoma involving half of the visual field
    paracentral scotoma
    a scotoma that is adjacent to the fixation point
    flittering scotoma, scintillating scotoma
    a localized area of diminished vision edged by shimmering colored lights; in many people it indicates the onset of migraine
    eyelessness
    blindness due to loss of the eyes
    figural blindness
    inability to see shapes and contours
    type of:
    disability, disablement, handicap, impairment
    the condition of being unable to perform as a consequence of physical or mental unfitness
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