Shift of Colorimetric Values in Ishihara Pseudoisochromatic Plates with Plate Aging
Korean Journal of Ophthalmology
;
: 145-148, 2005.
Artículo
en Inglés
| WPRIM
| ID: wpr-172727
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.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Espectrofotometría
/
Factores de Tiempo
/
Pruebas de Visión
/
Defectos de la Visión Cromática
/
Color
/
Percepción de Color
/
Colorimetría
Tipo de estudio:
Estudio pronóstico
Límite:
Humanos
Idioma:
Inglés
Revista:
Korean Journal of Ophthalmology
Año:
2005
Tipo del documento:
Artículo
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