Eckhorn, Reinhard and Wilms, Marcus and Schanze, Thomas and Eger, Marcus and Hesse, Lutz and Eysel, Ulf T and Kisvárday, Zoltán F and Zrenner, Eberhart and Gekeler, Florian and Schwahn, Helmut and Shinoda, Keisuke and Sachs, Helmut and Walter, Peter (2006) Visual resolution with retinal implants estimated from recordings in cat visual cortex. Vision research 46 (17), pp. 2675-2690.
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We investigated cortical responses to electrical stimulation of the retina using epi- and sub-retinal electrodes of 20-100 microm diameter. Temporal and spatial resolutions were assessed by recordings from the visual cortex with arrays of microelectrodes and optical imaging. The estimated resolutions were approximately 40 ms and approximately 1 degrees of visual angle. This temporal resolution of 25 frames per second and spatial resolution of about 0.8 cm at about 1m and correspondingly 8 cm at 10 m distance seems sufficient for useful object recognition and visuo-motor behavior in many in- and out-door situations of daily life.
|Institutions:||Medicine > Lehrstuhl für Augenheilkunde|
|Keywords:||Retina prosthesis; Visual cortex; Spatial and temporal resolution; Electrical stimulation|
|Subjects:||600 Technology > 610 Medical sciences Medicine|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||30 Mar 2007|
|Last Modified:||20 Jul 2011 21:05|