The effect of photopigment optical density on the color vision of the anomalous trichromat

► Photopigment optical density (OD) varies between observers. ► We model the effect of OD variation on anomalous trichromatic color vision. ► OD variation affects the predicted quality of color vision of anomalous trichromats. ► A difference in OD of 0.1 might be as valuable as an extra 1 nm peak se...

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Bibliographic Details
Published in:	Vision research (Oxford) Vol. 51; no. 20; pp. 2224 - 2233
Main Authors:	Thomas, P.B.M., Formankiewicz, M.A., Mollon, J.D.
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 15-10-2011 Elsevier
Subjects:	Anomalous trichromacy Biological and medical sciences Color vision Color Vision - physiology Color Vision Defects - physiopathology Computational modeling Discrimination (Psychology) - physiology Eye and associated structures. Visual pathways and centers. Vision Fundamental and applied biological sciences. Psychology Humans Models, Neurological Optical density Photopigment Retinal Cone Photoreceptor Cells - physiology Retinal Pigments - physiology Vertebrates: nervous system and sense organs Color vision Photopigment Computational modeling Anomalous trichromacy Optical density Simulation model Density
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Summary:	► Photopigment optical density (OD) varies between observers. ► We model the effect of OD variation on anomalous trichromatic color vision. ► OD variation affects the predicted quality of color vision of anomalous trichromats. ► A difference in OD of 0.1 might be as valuable as an extra 1 nm peak separation of photopigments. We present a theoretical model to estimate the influence of photopigment optical density (OD) on the color vision of anomalous trichromats. Photopigment spectral sensitivities are generated using the Lamb (1995) template, which we correct for OD and pre-receptoral filters. Sixteen hyperspectral images ( Foster, Nascimento, & Amano, 2004; Nascimento, Ferreira, & Foster, 2002) are analyzed, and the signals produced in the post-receptoral channels calculated. In the case of anomalous trichromats whose two longer-wavelength cones have peak sensitivities that lie close together in the spectrum, color vision can be substantially enhanced if the cones differ in optical density by a realistic amount.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0042-6989 1878-5646
DOI:	10.1016/j.visres.2011.08.016