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BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Penn Engineering Events - ECPv6.18.0//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-WR-CALNAME:Penn Engineering Events X-ORIGINAL-URL:https://seasevents.nmsdev7.com X-WR-CALDESC:Events for Penn Engineering Events REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20190310T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20191103T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20200308T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20201101T060000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:20210314T070000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:20211107T060000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/New_York:20201118T130000 DTEND;TZID=America/New_York:20201118T140000 DTSTAMP:20201028T193953Z CREATED:20201028T193953Z LAST-MODIFIED:20201028T193953Z UID:3618-1605704400-1605708000@seasevents.nmsdev7.com SUMMARY:Neuroengineering/BE Seminar: “Photovoltaic Restoration of Sight in Age-related Macular Degeneration” (Daniel Palanker) DESCRIPTION:Presented by The Center for Neuroengineering and Therapeutics Presents and The Bioengineering Department. \nCheck email for zoom link or Everett Prince at eprince@seas.upenn.edu. \nRetinal degenerative diseases lead to blindness due to loss of the “image capturing” photoreceptors\, while neurons in the “image-processing” inner retinal layers are relatively well preserved. Information can be reintroduced into the visual system using electrical stimulation of the surviving inner retinal neurons. We developed a photovoltaic substitute of photoreceptors which convert light into pulsed electric current\, stimulating the secondary retinal neurons. Visual information captured by a\ncamera is projected onto the retina from augmented-reality glasses using pulsed near-infrared (~880nm) light. This design avoids the use of bulky electronics and wiring\, thereby greatly reducing the surgical complexity. Optical activation of the photovoltaic pixels allows scaling the number of electrodes to thousands. In preclinical studies\, we found that prosthetic vision with subretinal implants\npreserves many features of natural vision\, including flicker fusion at high frequencies (>30 Hz)\, adaptation to static images\, antagonistic center-surround organization and non-linear\nsummation of subunits in receptive fields\, providing high spatial resolution. Results of the clinical\ntrial with our implants (PRIMA\, Pixium Vision) having 100μm pixels\, as well as preclinical\nmeasurements with 75 and 55μm pixels\, confirm that spatial resolution of prosthetic vision can\nreach the pixel pitch. Remarkably\, central prosthetic vision in AMD patients can be perceived\nsimultaneously with peripheral natural vision. For broader acceptance of this technology by patients who lost central vision due to agerelated macular degeneration\, visual acuity should exceed 20/100\, which requires pixels smaller than 25μm. I will describe the fundamental limitations in electro-neural interfaces and 3-dimensional configurations which should enable such a high spatial resolution. Ease of\nimplantation of these wireless arrays\, combined with high resolution opens the door to highly functional restoration of sight. URL:https://seasevents.nmsdev7.com/event/neuroengineering-be-seminar-photovoltaic-restoration-of-sight-in-age-related-macular-degeneration-daniel-palanker/ CATEGORIES:Seminar END:VEVENT END:VCALENDAR