title: Basic phenomena in acquired colour vision deficiency.
abstract: Acquired colour vision defects are directly related to the fixation mode: blue-yellow defects in foveolar fixation, blue-yellow or red-green defects in eccentric fixation. The primary localization of a disease can be retraced from the degree of cone damage. Optic nerve diseases essentially lack signs of cone damage. Processes at the level of the choriocapillaris/retinal pigment epithelium induce a non-selective receptor impairment. There are minor signs of cone damage. In cone dystrophies there is selective cone damage. Scotopization indicates a relatively well-preserved rod function.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000209:etiology / Q000503:physiopathology*; D005123:Eye / Q000503:physiopathology*; D005128:Eye Diseases / Q000150:complications* / Q000175:diagnosis; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008268:Macular Degeneration / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000503:physiopathology; D014792:Visual Acuity