Cone opponency in the near peripheral retina

• Published in: Visual neuroscience Vol. 23; no. 3-4; pp. 503 - 507
• Main Authors: MURRAY, I.J., PARRY, N.R.A., McKEEFRY, D.J.
• Format: Journal Article
• Language: English
• Published: New York, USA Cambridge University Press 01.05.2006
• Subjects: Adaptation, Ocular - physiology; Adult; Attention - physiology; Changes; Color Perception - physiology; Color Perception Tests - methods; Color vision; Cone opponency; Contrast Sensitivity - physiology; Eyes & eyesight; Female; Humans; Male; PERIPHERAL VISUAL FIELD; Periphery; Photic Stimulation - methods; Retina - cytology; Retina - physiology; Retinal Cone Photoreceptor Cells - physiology; Visual Fields - physiology; Cone opponency; Color vision; Periphery
• ISSN: 0952-5238; 1469-8714
• DOI: 10.1017/S0952523806233315

Changes of color perception in the peripheral field are measured using an asymmetric simultaneous matching paradigm. The data confirm previous observations in that saturation changes can be neutralized if the test target is increased in size. However, this compensation does not apply to hue shifts. We show that some hues remain unchanged with eccentricity whereas others exhibit substantial changes. Here the color shifts are plotted in terms of a second-stage cone opponent model. The data suggest that the S-L+M channel is more robust to increasing eccentricity than the L-M channel. Observations are interpreted in terms of the known underlying morphological and physiological differences in these channels.