Print This Page
Title	EFFECT OF FOUR DIFFERENT LIGHT SOURCES ON NORMAL COLOR VISION
Program Number	050089
Author	Buckingham, Robert S. OD, FAAO (Michigan College of Optometry)
Coauthor(s)	Jaimie Behrens (OD), Wendy Nielubowicz (OD)
Topic	Public Health & Environmental Optometry
Day	N/A
Time	-
Room
Abstract	PURPOSE: This study evaluates how color discrimination may be affected in different lighting situations. METHODS: Forty-nine subjects were tested using the Farnsworth Dichotomous test (D-15) under 4 different light sources; illuminant C (as a control), a sodium vapor lamp, an incandescent lamp and a metal halide lamp. The caps in the D-15 were arranged in a pre-determined random order for each light source. This order was held constant for each subject. The numerical order of the caps arranged by the subject was recorded and that sequence was used to calculate a color confusion index (CCI) score using the color vision recorder. RESULTS: There was a statistically significant difference between the mean CCI score of the sodium vapor lights and the incandescent lights (p=.011) as well as the sodium vapor lights and the metallic halide lights (p=.011). There was no statistical difference found between the means calculated for illuminant C and the other three light sources. CONCLUSIONS: One can conclude from this study that the differing light sources can affect the performance on the D-15 and may affect color discrimination.
Key Words	Color vision, Environmental vision