Color discrimination in individuals with light and dark irides: an evaluation of the effects of intraocular straylight and retinal illumination.

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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.
Original languageEnglish
Pages (from-to)A268-A273
JournalJournal of the Optical Society of America
Issue number4
Early online date18 Feb 2014
Publication statusPublished - 1 Apr 2014



  • Color vision
  • Spatial discrimination
  • Visual optics
  • Aging
  • changes.

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