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Analysis of tritan detection thresholds and discrimination errors

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Abstract

The Type III acquired blue yellow color vision defect is characterized by failure of screening plates (e.g. the Standard Pseudo-isochromatic Plates, Part II) and an accumulation of errors on the Farnsworth-Munsell 100-hue test. Recent studies of acquired color vision defects have included specialized tests of increment detection for the isolated S (Short Wavelength Sensitive) cone system. A puzzling aspect in at least one such study was the lack of correlation between evidence of S cone loss on increment detection and evidence of S cone loss on the FM-100-hue test1. The purpose of this paper is to attempt to reconcile these findings, and to provide a unified framework for analyzing detection and discrimination data.

© 1990 Optical Society of America

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