title: Central and peripheral achromatic points in protanopes and deuteranopes.
mesh_terms: D003118:Color Perception; D003117:Color Vision Defects / Q000503:physiopathology*; D006801:Humans; D010786:Photoreceptor Cells / Q000502:physiology; D012160:Retina / Q000503:physiopathology; D013057:Spectrum Analysis