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At least 811 records · Page 45Linked to original sources
PubMed1976

Unilateral colour vision defect resembling tritanopia.

A case of unilateral tritan defect is described. Colour-naming experiments showed that the tritanopic eye could perceive multiple colour hues. Although the defect resembled congenital tritanopia, it was considered to be acquired secondary to retinal pathology.

Adult↗
PubMed2002

[Direct heterochromatic comparison for color perception evaluation].

We analyzed the data obtained from the Malbrel chromatometer, a device that examines color vision. The principle of the chromatometer is based on the opponent chromatic receptive fields of the retina. It shows two adjacent luminous windows of small size that can be either red and green or yellow and blue. The patient's task is to adjust the brightness of the red window (or the yellow window) to a fixed green (or blue) window luminance. Several luminance levels were studied and data were recorded using specific software. The luminance and the chromatic coordinates of the windows have been determined. The aim of the statistical study was to compare the data with a simple distribution law and therefore to know if the chromatometre allows measurement of color vision. In this investigation, 95 eyes were studied. Each patient has to match 4 red/green brightness levels and 4 yellow/blue brightness levels. The main characteristics were evaluated: the means, medians and standard deviations. Then, from the qq-plots we verified that the data distribution was near normal distribution. The percentile curves allowed 3 types of color vision to be determined. Around the median normal color vision can be defined. Between the 10(th) and the 20(th) percentiles and between the 80(th) and the 90(th) percentiles, a small anomaly was present. Below the 10(th) percentile or above the 90(th) percentile, a substantial anomaly was present.

Adult↗
PubMed2002

[Acquired disorders of color vision].

This article is a general view of acquired disorders of color vision. The revision of the best known methods and of the etiopathogenic classification is not very important in ophthalmology but on the other hand, the detection of the blue defect advertise and associated ocular pathology. There is a major interest in serious diseases as multiple sclerosis, AIDS, diabetes melitus, when the first ocular sign can be a defect in the color vision.

Color Perception Tests↗