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单词 visual defect
释义
visual defect
(once / 381269 pages)
n

WORD FAMILY
visual defect: visual defects
USAGE EXAMPLES
“Children are born with unusual brain scans as well as microcephaly and hearing and visual defects.”
The Guardian(Mar 22, 2016)
Agriculture Secretary Tom Vilsack said the changes take into account current science, updating the inspection system from 1950s thinking that visual defects meant safety problems.
Washington Times(Aug 01, 2014)
Well, if you stepped back and asked what might be an effective therapy for visual defects, first-person shooter games have a lot of what’s needed.
New York Times(Aug 27, 2012)
n impairment of the sense of sight
Syn|Hypo|Hyper
vision defect, visual disorder, visual impairment
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
disability, disablement, handicap, impairment
the condition of being unable to perform as a consequence of physical or mental unfitness
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更新时间:2024/12/23 20:00:34