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Title	COLOR DISCRIMINATION AND THE LANTHONY DESATURATED D-15 COLOR VISION TEST
Program Number	075046
Author	Buckingham, Robert S. OD, FAAO (Michigan College of Optometry)
Coauthor(s)	John Gaffka (OD), Anupam Laul (OD)
Topic	Public Health & Environmental Optometry
Day	Wednesday, October 24, 2007
Time	9:00 AM-6:15 PM
Room
Abstract	PURPOSE: In order to predict the effects of various light sources on an individual’s color discrimination, the Lanthony Desaturated D-15 color vision test was administered to volunteers with normal color vision and no ocular pathologies under different five illumination sources. METHODS: The sources of illumination included illuminant C (as a control), incandescent lamp, sodium vapor lamp, metal halide lamp, and fluorescent bulb. All of the illumination sources were calibrated to 28 foot-candles. The color vision of 33 subjects was tested with the Lanthony Desaturated D-15 color vision test. RESULTS: The results were analyzed using the Color Vision Recorder and SPSS software. For each subject, the Color Vision Recorder was employed to compute Bowman’s scores for the Color Confusion Index (CCI) and Age Corrected Color Confusion Index (AC-CCI). In addition, Vingrys and King-Smith’s Confusion Index (C-index) and Selectivity Index (S-index) were calculated. The CCI, AC-CCI, C-index, and S-index were analyzed using a repeated measures within-subjects Analysis of Variance (ANOVA) test. Using pairwise comparisons there was a statistically significant difference found with 1) the mean CCI sodium vapor score 2) the ACCCI sodium vapor score 3) the C-Index sodium vapor score and 4) the mean number of errors per subject with the sodium vapor light when compared to all other light sources. CONCLUSIONS: This study has shown how a change in lighting conditions can affect a person's ability to discriminate colors. This can show importance because it can affect how a person may perform color discriminating tasks at work, home or elsewhere.
Key Words	Color vision, Environmental vision