visual defect

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ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.visual defect - impairment of the sense of sightvisual defect - 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)
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; "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
References in periodicals archive ?
Last month I said I would mention a very rare case where we created a Venturi effect with venting, which contributed to a visual defect on the part.
It is important to correctly identify the nystagmus and any underlying visual defect, and to offer genetic counselling, when appropriate.
Often there is a 'ring scotoma' or ring shaped visual defect where objects will disappear and come back as the eye moves around.
and we suspect that might be true for any kind of visual defect," Maurer pointed out.
VisionPro Surface combines a revolutionary new visual defect detection and classification technology with a simple user interface to enable accurate defect detection, classification, and surface texture assessment during the manufacturing process.
In glaucoma, for instance, the pattern of retinal thinning is nonspecific and fails to correlate with the visual defect.
Typically, we associate strokes with limb paralysis and impaired speech, but 20% of those who suffer from a stroke will end up with a visual defect called Hemianopia, a partial blindness caused by damage to part of the brain called the primary visual cortex.
August Technology Corporation, based in Bloomington, Minnesota, is a leading supplier of automated visual defect inspection equipment for the microelectronics industry and has established service and sales representation in all major microelectronic markets worldwide.
Miller of the University of Arizona in Tucson stressed the need for early detection of amblyopia, another visual defect in children.
Almost half those tested had a visual defect compared with 38pc of women.
In that version, the headset is connected to a computer that corrects for the patient's visual defect and then displays the corrected image on the video screens, says Doug Rickman, low-vision project manager at NASA's Stennis Space Center in Mississippi.
Williams and Lovegrove note that the lack of an easily diagnosed visual defect in dyslexics has led many people to assume that these children suffer from a generalized language deficit.