Inter-eye comparison on the 100 hue test.
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Adult↗
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Results for “Color Perception Tests”
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Theory and practice of colour vision testing: a review. 1.
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Adult↗
Acquired dyschromatopsia: some comments concerning the procedure of testing and interpretation.
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Color Perception Tests↗
[Determining a standard for the diagnosis of blue-yellow defects in the F-M 100 hue test].
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Color Perception Tests↗
[Determining a standard for the diagnosis of red-green defects in the F-M 100 hue test].
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Color Perception Tests↗
[Assessment of color discrimination test as aptitude test. Indices deduced from the error scores in the test (author's transl)].
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Adolescent↗
[The phenotype of heterozygotic females in congenital red-green color blindness (author's transl)].
Varying degrees of deficient color perception along the Deutan axis within one family have been studied and presented. All seven family members exhibit manifest color blindness. The question of the phenotype among heterozygotic females is discussed on the basis of the data found by anomaloscope testing and the hue tests of Farnsworth D-15 and Farnsworth 100.
Color Perception Tests↗
A new way to use the Ishihara test.
The Ishihara plates are widely used as a test for colour vision. Originally designed for the purpose of detecting congenital red-green colour blindness, the test also has some value in demonstrating acquired colour vision defects. There are, however, several disadvantages in the present arrangement of the plates. A modification of the test, involving the rearrangement of the order of the plates, is presented which, together with a new recording chart, simplifies both the administration and the interpretation of the test.
Color Perception↗
The Boström-Kugelberg pseudo-isochromatic plates. How efficient is the third edition?
The third edition of the Boström-Kugelberg pseudo-isochromatic plates was printed to the best possible visual match with the second edition. Slight colour differences between the 2 editions initiated this study where 72 colour defectives and 57 normal trichromats were tested with the plates and classified with the aid of Nagel's anomaloscope. Of the defectives, the plate test disclosed all but two anomalous trichromats. One normal subject was falsely classified as defective. The plates had to be shown twice according to the instructions since otherwise 13 of the 53 normals were misclassified. Three plates were shown to have low sensitivity; one is best used as a demonstration plate, and the other two can be deleted without lost efficiency. Forty-eight of the colour defectives were also studied with Farnsworth's lantern. The correlation between the numbers of plate and signal errors was weak. All subjects who failed the lantern test made several plate errors, but 15 subjects who passed the lantern test, made two or more errors on the plate test. The outcome of the plate test does not give evidence of the subject's lantern test performance.
Adolescent↗
Criterion validity of four tests for red-green color blindness.
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Adolescent↗
Performance of the Farnsworth lantern test as related to type and degree of color vision defect.
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Color Perception Tests↗
Theory and practice of colour vision testing: a review: 2.
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Adolescent↗
[Color chart test for early detection and quantitative follow-up of the side effects of ethambutol on the optic nerve: the "65 Test"].
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Adult↗
[Study of various pseudo-isochromatic tests in relation to Oberthur's color atlas].
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Color↗
City tests and information theory.
The responses of 455 male subjects on both editions of the City University Colour Vision Tests (City 1 and City 2) were recorded after the establishment of each subject's criterial status using the Nagel anomaloscope. Based on the Information Theory, each plate was assigned a contributory weighted score to the total test score. Using informational analysis, a cut-off point in test score separating normals and defectives was also determined for each test. This scoring system is an improvement on the existing (or manufacturer's) system. The analysis has also shown that the second edition (City 2) is a considerable improvement on the first (City 1). Despite this, even the improved City 2, like its origin, the D-15, is shown to be poorer than most of the commonly used PIC tests.
Adolescent↗
Distance, duration and blur effects on the perception of pseudoisochromatic stimuli.
Two experiments are reported that examine the effects of viewing distance, viewing duration, and stimulus clarity on performance with three popular versions of the pseudoisochromatic tests of colour deficiency. With a large sample of colour-normal observers, highly significant effects of these viewing conditions are found. In addition, large differences in sensitivity to these conditions are obtained among the three tests employed (The American Optical Corporation test, the Dvorine test, and the Ishihara test). Results are discussed in terms of practical implications for test administration and in terms of likely processes, in addition to colour discrimination, assessed by these tests.
Adult↗