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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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Macular Pigment: Nature’s Notch Filter

Macular Pigment: Nature’s Notch Filter

(p.273) Chapter 28 Macular Pigment: Nature’s Notch Filter
Normal and Defective Colour Vision

J. D. Moreland

S. Westland

Oxford University Press

Macular pigment (MP) is a natural filter with ‘notch’ transmission characteristics. This chapter examines the effects of MP on surface colours in Normal and Anomalous Trichromats for a database of 1782 reflectance spectra. The results show that increases in MP concentration produce a general clockwise rotation of chromaticity around the illuminant point for Normals and Anormals. The chromaticity shifts, associated with rotation, increase with distance from the illuminant point.

Keywords:   macular pigment, notch filter, surface colours

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