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Article
December 1946

EFFECT OF QUALITY OF ILLUMINATION ON THE RESULTS OF THE ISHIHARA TEST

Author Affiliations

NEW YORK
From the Knapp Memorial Laboratories, Institute of Ophthalmology, Columbia University College of Physicians and Surgeons.

Arch Ophthalmol. 1946;36(6):685-699. doi:10.1001/archopht.1946.00890210698004
Abstract

THIS is the third in a series of reports dealing with the Ishihara test for color blindness. In the first of these reports1 the fifth edition of the test was evaluated as a means of detecting and analyzing defective color vision. The data reported were collected during the course of a study of 106 persons having defective color vision of varying types and amounts, including 74 who had definite defects in color vision and 32 who had low, but normal, color vision. To study these persons a comprehensive battery of color tests2 was used, some of which are well known in the field of color blindness testing and some less well known ; some have been devised in this laboratory. The fifth edition of the Ishihara test, one of the best known of the shorter editions, was selected for inclusion in the battery of tests. The results obtained from

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