New test for the detection of tritan defects evaluated in two surveys
article
An apparatus is described which tests for the presence of a tritan defect. It consists of a flickering blue test field seen on a steady yellow-orange background. The stimulus may be presented attenuated with a 2.6 neutral density filter or unattenuated. Tritans fail to see the attenuated stimulus. Inclusive of explanation the test takes about 2 min. In two surveys of 480 and 1023 subjects respectively, three congenital tritans were found. Also failing the test were two protans with a low sensitivity of the blue cone system, and a few subjects apparently not having a tritan defect but possibly ocular pathology.
Topics
TNO Identifier
228993
ISSN
00426989
Source
Vision Research, 21(8), pp. 1303-1306.
Pages
1303-1306
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