Color discrimination in optic nerve diseases

Abstract

The characteristics of color discrimination of 71 eyes in 49 patients with optic nerve diseases were examined using the Farnsworth-Munsell 100-Hue test (F-M 100 Hue test). The orientation axes of the hue errors of the F-M 100 Hue test were analyzed objectively using the method recommended by Kitahara (1982).

As a result, the mean value of the amplitude was 0.29, which means that it was not possible to see a clear orientation of the hue errors in most optic nerve diseases. In most cases in which the amplitudes were more than 0.2, the orientation axes of the hue errors fell between the deutan axis and tritan axis, showing a very definite trend toward the scotopic axis.

Key Words:

• acquired color vision defect
• optic nerve disease
• color discrimination
• Farnsworth-Munsell 100-Hue test