[Central vision].
The clinical assessment of vision by means of optotypes does by no means test just two-point resolution, since a correct naming of the letters or digits requires a preceding visual object recognition. Cortical lesions can massively deteriorate vision up to a "Seelenblindheit" in spite of intact optics and retina. There are different processing levels involved in the analysis which can be individually defective, leading to disorders from visual indiscrimination to agnosia or anomia.
Fahle
M
M
Human-Neurobiologie, Universität Bremen, Bremen.
D000377:Agnosia / Q000175:diagnosis / Q000503:physiopathology; D000849:Anomia / Q000175:diagnosis / Q000503:physiopathology; D019575:Blindness, Cortical / Q000175:diagnosis / Q000503:physiopathology; D002540:Cerebral Cortex / Q000503:physiopathology; D015350:Contrast Sensitivity; D003627:Data Interpretation, Statistical; D003937:Diagnosis, Differential; D004193:Discrimination Learning / Q000502:physiology; D006801:Humans; D010364:Pattern Recognition, Visual / Q000502:physiology; D014786:Vision Disorders / Q000175:diagnosis* / Q000503:physiopathology; D014787:Vision Tests / Q000379:methods* / Q000706:statistics & numerical data; D014794:Visual Fields / Q000502:physiology