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Yoshiki Tanaka, Sho Yokoyama, Hideki Nakamura, Kazuo Ichikawa, Shoko Tanabe, Kato Yukihito, Rie Horai, Kiyoshi Tanaka; The Difference of Luminance Sensitivity for Congenital Color Vision Defect using Flicker Method on Liquid Crystal Display. Invest. Ophthalmol. Vis. Sci. 2016;57(12):194.
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© ARVO (1962-2015); The Authors (2016-present)
To test the flicker method for several colors is useful to examine the progression and prognosis of eye disease associated with acquired color vision deficiency. In this study, we measured the luminance sensitivity using flicker method for congenital color vision defectives and normal subjects on LCD (Liquid Crystal Display) as the basic study.
Three normal subjects and four congenital color vision defectives (protanope, deuteranope, deutaranomal, minimal deutaranomal) are enrolled in this study. The mean age was 34.3±7.9 years old (26~47). The spherical equivalent was -2.04±1.75D. They had best corrected visual acuity of 20/16 or above. All the subjects had no ocular disease or color anomaly. The color vision was tested by Ishihara test, SPP1 (Standard Pseudoisochromatic Plates parts 1), panel D-15 and Nagel anomaloscope. We utilized a laptop personal computer and LCD (ColorEdge CG245W, EIZO Corp., Ishikawa, JPN) to show the flicker stimulus. The visual distance, visual angle, and flicker frequency were 1 [m], 2 [degree] and 15[Hz] respectively. The reference colors were 15 colors (chroma 6, luminance 30[cd/m2]) of New Color Test (Lanthony) and the test color was white point D65. The subjects adjusted the luminance of the test color to minimize the flicker for each reference colors. The test was conducted in the dark room.
The Figure shows the result of flicker method. The patterns of matched luminance were clearly different between three groups. The luminance of the test color for red colors showed low value in the protan defect. On the other hands, the luminance of the test color for green colors showed low value in the deutan defect. Just the colors of GY (Green-Yellow) and BP (Blue-Purple) were almost same luminance between the three groups.
The luminance sensitivity for congenital color vision defect showed the characteristics of type of color vision defects by flicker method on LCD. In the future, we will test the acquired color vision defects by using advanced easier flicker method for clinical use.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
The luminance of test color (white point D65) matched by flicker method.
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