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Normal and Defective Colour Vision$
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John D. Mollon, Joel Pokorny, and Ken Knoblauch

Print publication date: 2003

Print ISBN-13: 9780198525301

Published to Oxford Scholarship Online: April 2010

DOI: 10.1093/acprof:oso/9780198525301.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 20 October 2021

Extreme Anomalous Trichromatism

Extreme Anomalous Trichromatism

(p.364) Chapter 38 Extreme Anomalous Trichromatism
Normal and Defective Colour Vision

Jennifer Birch

Oxford University Press

Progress in the molecular genetics of colour vision deficiency relies on matching phenotype with genotype. Thus, it is essential that accurate diagnosis of the type of red-green colour deficiency is obtained and that unusual phenotypes, such as extreme anomalous trichromatism, are identified. Accurate diagnosis is obtained by careful determination of the limits of the red-green matching range on a spectral anomaloscope. This chapter shows that extreme anomalous trichromats make matches with a significant excess of both red and green light, but are unable to match all red-green mixture ratios.

Keywords:   colour vision, red-green colour deficiency, spectral anomaloscope, Nagel anomaloscope, anomalous trichromats

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