title: Large-field trichromacy in protanopes and deuteranopes.
abstract: Protanopes and deuteranopes do not accept the classical dichromatic matches when field size extends to 8 degrees visual angle. Their unique matches of spectral yellow to a mixture of red and green are then mediated by the photoreceptors of small-field dichromacy interacting with a photoreceptor with the spectral sensitivity of rhodopsin. Our data suggest that large-field trichromacy is a general feature of protanopia and deuteranopia.
mesh_terms: D003119:Color Perception Tests / Q000379:methods; D003117:Color Vision Defects / Q000503:physiopathology*; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D012243:Rhodopsin / Q000502:physiology; D014794:Visual Fields
chemical_list: D012243:Rhodopsin