vision defect sightlessness colour blindness day blindness hemianopia amblyopia diplopia tunnel vision disability retinal detachment moon blindness detached retina hemeralopia hemianopsia night blindness disablement colour vision deficiency detachment of the retina ametropia nyctalopia aniseikonia visual disorder visual impairment handicap double vision scotoma anorthopia quadrantanopia amaurosis color vision deficiency color blindness blindness metamorphopsia photoretinitis impairment xanthopsia aphakia cecity

optical optic ocular

disadvantage shortcoming

congenital anomaly congenital abnormality imperfection congenital defect birth defect congenital disorder myelatelia imperfectness

burn mark smirch blackhead mar daub nevus gouge dent visual aspect mole chip check milium mark blot spot smudge comedo whitehead birthmark blemish wart scratch slur chatter mark smear crack burn appearance scrape scar stigma ding verruca nick

blister flaw fault imperfection bug glitch imperfectness hole

visible seeable ocular

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