Color discrimination in individuals with light and dark irides: an evaluation of the effects of intraocular straylight and retinal illumination.
To investigate the effect of induced intraocular straylight on the Farnsworth-Munsell 100-hue test performance in individuals with light and dark irides, 28 young subjects were tested both with and without a quantified light-scattering filter. The filter produced a significant increase in the total error scores (p<0.05), but no significant correlation was found between the level of straylight and error score (p>0.05). The development of a tritan-like defect in the dark-eyed participants can be attributed to the effect of light attenuation caused by filter absorption, which markedly affects S-cone mediated color discrimination. The combined effect of higher short-wavelength absorption of melanin and macular pigment in the dark eyes may be involved.
Margarita
M
Zlatkova
Raymond O
RO
Beirne
Nuala A
NA
Hinds
D000328:Adult; D003118:Color Perception / Q000502:physiology*; D003119:Color Perception Tests / Q000379:methods*; D004192:Discrimination, Psychological / Q000502:physiology*; D005260:Female; D006801:Humans; D007498:Iris / Q000378:metabolism*; D008027:Light; D008297:Male; D010858:Pigmentation; D012160:Retina / Q000166:cytology / Q000502:physiology*; D012542:Scattering, Radiation; D055815:Young Adult