Abstract

In this paper, we describe how a circular reflective neutral-density wedge can be used to construct an apparatus which provides a relatively rapid procedure for the clinical measurement of saturation discrimination. Subsequent to an initial measurement of the patient’s relative luminosity function, the patient need only turn a single control which varies the calorimetric purity of a test field which remains luminance matched to a white light reference field.

© 1987 Optical Society of America

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