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CONTRAST THRESHOLDS OF DIABETIC PATIENTS DETERMINED BY VECP AND PSYCHOPHYSICAL MEASUREMENTS
Author(s) -
YAMAZAKI H.,
ADACHIUSAMI E.,
CHIBA J.
Publication year - 1982
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1982.tb03029.x
Subject(s) - contrast (vision) , medicine , diabetes mellitus , audiology , ophthalmology , optics , physics , endocrinology
VECPs to checkerboard pattern reversal (12 Hz reversal) at different contrast levels were measured in normal subjects and in patients suffering from diabetes mellitus, with visual acuities above 0.8. VECP contrast threshold was obtained by extrapolating VECP amplitude vs contrast on a log scale to zero μV. Results were compared with psychophysical thresholds. It was shown that both VECP and psychophysical contrast thresholds were significantly higher in the diabetic patients than in the normal subjects.