{"id":13295,"date":"2013-02-28T17:12:21","date_gmt":"2013-02-28T17:12:21","guid":{"rendered":"http:\/\/www.alfredoferrer.com\/?p=13295"},"modified":"2024-12-03T20:44:56","modified_gmt":"2024-12-03T20:44:56","slug":"detection-of-motion-by-blind-subjects-with-argus-ii-retinal-prosthesis","status":"publish","type":"post","link":"https:\/\/alfredoferrer.com\/en\/detection-of-motion-by-blind-subjects-with-argus-ii-retinal-prosthesis\/","title":{"rendered":"Detection of Motion by Blind Subjects With Argus II Retinal Prosthesis"},"content":{"rendered":"<p><strong>Objective<\/strong> To investigate the ability of 28 blind subjects implanted with a 60-electrode Argus II (Second Sight Medical Products Inc) retinal prosthesis system to detect the direction of a moving object.<\/p>\n<p><strong>Methods<\/strong> Blind subjects (bare light perception or worse in both eyes) with retinitis pigmentosa were implanted with the Argus II prosthesis as part of a phase 1\/2 feasibility study at multiple clinical sites worldwide. The experiment measured their ability to detect the direction of motion of a high-contrast moving bar on a flatscreen monitor in 3 conditions: with the prosthesis system on and a 1-to-1 mapping of spatial information, with the system off, and with the system on but with randomly scrambled spatial information.<\/p>\n<p><strong>Results<\/strong> Fifteen subjects (54%) were able to perform the task significantly better with their prosthesis system than they were with their residual vision, 2 subjects had significantly better performance with their residual vision, and no difference was found for 11 subjects. Of the 15 better-performing subjects, 11 were available for follow-up testing, and 10 of them had significantly better performance with normal rather than with scrambled spatial information.<\/p>\n<p><strong>Conclusions<\/strong> This work demonstrates that blind subjects implanted with the Argus II retinal prosthesis were able to perform a motion detection task they could not do with their native vision, confirming that electrical stimulation of the retina provides spatial information from synchronized activation of multiple electrodes.<\/p>\n<p><em>Source:\u00a0<a href=\"http:\/\/archopht.jamanetwork.com\/article.aspx?articleid=1375731\" target=\"_blank\" rel=\"noopener\">Archives of Ophthalmology<\/a>, Feb 2013.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Objective To investigate the ability of 28 blind subjects implanted with a 60-electrode Argus II (Second Sight Medical Products Inc) retinal prosthesis system to detect the direction of a moving&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/posts\/13295"}],"collection":[{"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/comments?post=13295"}],"version-history":[{"count":1,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/posts\/13295\/revisions"}],"predecessor-version":[{"id":18359,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/posts\/13295\/revisions\/18359"}],"wp:attachment":[{"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/media?parent=13295"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/categories?post=13295"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alfredoferrer.com\/en\/wp-json\/wp\/v2\/tags?post=13295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}