Korean J Ophthalmol > Volume 19(2); 2005 > Article
Korean Journal of Ophthalmology 2005;19(2):145-148.
DOI: https://doi.org/10.3341/kjo.2005.19.2.145    Published online June 30, 2005.
Shift of Colorimetric Values in Ishihara Pseudoisochromatic Plates with Plate Aging.
Joon Young Hyon, Jin Hak Lee, Won Ryang Wee
1Department of Ophthalmology, Seoul National University Bundang Hospital, Seongnam, Korea. wrwee@snu.ac.kr
2Department of Ophthalmology, Seoul National University College of Medicine, Seoul, Korea.
3Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute, Seoul, Korea.
Abstract
PURPOSE
This study aimed to quantify the shift of colorimetric values in the Ishihara pseudoisochromatic test with aging of the plates. METHODS: Three sets of Ishihara pseudoisochromatic plates with different published dates (printed in 1971, 1983 and 2001) were tested. Positions matching 32 dots with 13 colors were chosen from each set and the colorimetric values with the CIELAB and HSB/HLS color systems were measured with a spectrophotometer. Lightness (L*), red-green (a*), blue-yellow (b*), chroma, red hue, yellow hue, and green hue values from each set were compared. RESULTS: L* and chroma values were significantly higher in the older versions. The a* values shifted to red (increased a*) and the b* values shifted to yellow (increased b*) with plate aging. CONCLUSIONS: Our results showed that the pseudoisochromatic plates had significant changes in color values and a directional shift with aging.
Key Words: CIELab color model;Colorimetric values;Color vision test;Ishihara pseudoisochromatic plates;Spectrophotometer
TOOLS
METRICS Graph View
  • 5 Crossref
  • 9 Scopus
  • 654 View
  • 7 Download
Related articles


ABOUT
BROWSE ARTICLES
EDITORIAL POLICY
FOR CONTRIBUTORS
Editorial Office
SKY 1004 Building #701
50-1 Jungnim-ro, Jung-gu, Seoul 04508, Korea
Tel: +82-2-583-6520    Fax: +82-2-583-6521    E-mail: kos@ophthalmology.org                

Copyright © 2022 by Korean Ophthalmological Society.

Developed in M2PI

Close layer
prev next