Colour vision as a diagnostic aid

Abstract

The minimum requirements for a reliable study of (acquired) defects of colour vision have been formulated by Verriest. Taking these minimum requirements as a guide, about 200 patients were selected. For the differential diagnosis of disorders of the retina and the optic nerve the determination of the neutral zone and examination with the anomaloscope are important. This is true for both red-green and blue-yellow defects.

Color vision deficiency in retinitis pigmentosa

“…These results are in agreement with previous studies suggesting that the SPP Part 2 able to identify acquired BY and RG deficiency [4,[9][10][11]. On the other hand, other researchers have found that the color vision losses in RPs could be either BY or RG deficiencies [1,2,4]. One possible explanation is that the color vision tests used in those experiments were not specifically designed to detect acquired color vision loss.…”

“…Color vision is well known to be affected in retinitis pigmentosa (RP) [1][2][3][4]. However, identifying the type of acquired color vision loss in RP may not be straightforward.…”

“…This study examined (1) the effectiveness of the Standard Pseudoisochromatic Plates Part 2 (SPP Part 2) and the flicker test using the temporal modulation threshold method (TMT) in identifying color vision deficiencies in RP are assessed. (2) The relative magnitudes of red-green (RG) and blue-yellow (BY) discrimination losses in RP were compared.…”

“…This makes them relatively inexpensive and requires little, if any, calibration. Although much research has been devoted to color vision in RP [2][3][4][5], little information is available on the specificity and sensitivity of the SPP Part 2 test in detecting color vision losses in RP subjects. The flicker threshold test named temporal modulation threshold technique (TMT) is a psychophysical means of determining color vision loss.…”

Scotopization and pseudoprotanomaly in blue‐yellow colour vision defects

“…As to the other colour vision tests used for this comparative study, all the subjects were examined under standardized conditions: 6 Philips fluorescent tubes colour 57, colour rendering index 96, providing 1750 lux at the level of the test table. A test battery was used including plate tests, the Farnsworth-Munsell 100 Hue test and derivative tests, and an anomaloscope (Pinckers 1980(Pinckers , 1982.…”