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FOVEAL SPECTRAL THRESHOLD IN TOBACCO AMBLYOPIA
Author(s) -
BHARGAVA S. K.,
PHILLIPS C. I.
Publication year - 1974
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.1755-3768.1974.tb00354.x
Subject(s) - foveal , significant difference , ophthalmology , medicine , blue light , red light , color vision defects , optometry , color vision , optics , retinal , biology , botany , physics
The foveal thresholds for red, green, and blue colours of twelve patients with tobacco amblyopia and twelve age‐matched normal controls were measured with the Tübinger perimeter. The difference in foveal thresholds between the patients and controls was highly significant for red (t = 17.35, P < 0.001), just significant at 5% level for green (t = 2.31) and was not significant for blue (t = 2.07, P > 0.05). The difference in thresholds between patients and controls for red was significantly greater than that for green and blue. The difference in threshold between patients and controls for green did not differ significantly from that for blue. Thus in tobacco amblyopia the foveal sensitivity to red was far more reduced than for the green or blue.