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Yoshiki Tanaka, Mari Takagi, Sho Yokoyama, Rie Horai, Shoko Tanabe, Kazuo Ichikawa; Comparison of color visual acuity measured using a liquid crystal display and a paper-based chart. Invest. Ophthalmol. Vis. Sci. 2017;58(8):5406.
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© ARVO (1962-2015); The Authors (2016-present)
In the past, we reported the color visual acuity (CVA) of several eye conditions and under several environmental conditions using a personal computer (PC) and Liquid Crystal Display (LCD). This study compared the CVA measured using an LCD and a paper-based chart (prototype) to obtain a simplified measurement of CVA.
Eleven normal subjects (11 eyes) were enrolled in this study. None of the subjects had any ocular disease or color anomaly. The mean age of the participants was 33.55 ± 7.54 years (age range, 26–47 years). The mean spherical equivalent was -2.83 ± 2.06, while the best corrected visual acuity was 20/13. Red (R) and Green-Yellow (GY), Blue-Green (BY), and Blue-Purple (BP) were used as the stimulus colors. The background color was achromatic (D65). CG245W (EIZO corporation) was adopted for the measuring the CVA on LCD. However, a paper-based chart was fixed on the frame for the visual acuity test. The LCD and paper-based chart tests were conducted in a dark room and under two ambient lighting conditions, respectively. The two ambient lighting conditions were as follows: fluorescent light (D65) to the frame and room illumination (condition 1 [C1]) and no fluorescent light (D65) to the frame but with room illumination (condition 2 [C2]).
There were significant differences in the CVA under each condition (R: p < 0.01, GY, BG, BP: p < 0.0001, Friedman test). A comparison between LCD and C1 showed significant differences (R: p < 0.01, GY: p < 0.0001, BG: p < 0.0001, BP: p < 0.05, Dunn’s post hoc test). A comparison between LCD and C2 also showed significant differences (GY: p < 0.01, Dunn’s post hoc test).
The CVA of R, BG, and BP measured under condition 2 was similar to the CVA measured using the LCD. The CVA of GY of the paper-based chart method was significantly different from the CVA obtained using LCD was because of the fact that there was a problem with the printing of the paper-based chart of GY. The paper-based chart was able to measure the CVA similar to the quality of CVA measured by LCD except for the paper-based chart of GY.
This is an abstract that was submitted for the 2017 ARVO Annual Meeting, held in Baltimore, MD, May 7-11, 2017.
The Color Visual Acuity measured using an LCD and paper-based chart. C1 – fluorescent light (D65) of the frame : ON, the room illumination : ON. C2 – fluorescent light (D65) of the frame : OFF, the room illumination : ON.
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