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Vision evaluation in people with Down's syndrome
Author(s) -
PérezCarpinell J.,
Fez M. D.,
Climent V.
Publication year - 1994
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1994.tb00098.x
Subject(s) - strabismus , hypermetropia , optometry , normal vision , psychology , vision test , binocular vision , color vision , normal population , contrast (vision) , population , astigmatism , audiology , eye disease , ophthalmology , visual acuity , medicine , refractive error , optics , physics , environmental health
We tested the colour vision of 72 people with Down's syndrome using the Ishihara test and an anomaloscope. We found that 13 of the subjects, 6 males and 7 females, had defective colour vision according to Pickford's classification. In monocular vision 10 eyes were protan (five simple, three extreme and two deviant), one eye was simple deuteranomalous and the remaining eyes were normal: in binocular vision four of the subjects were protan (two simple and two deviant), two subjects were deutan (one simple and one deviant) and the rest were normal. Many of our subjects had lens opacities, strabismus, nystagmus, hypermetropia, high myopia and astigmatism, confirming literature reports. The contrast sensitivity function measured with the VCTS test showed a considerable toss of low‐frequency sensitivity in our subjects compared to a normal population, which was more marked in the more severely impaired subjects.