Event
Bioengineering Seminar Series: Ethan Cohen
Friday, October 30, 2009
11:00 a.m.
Room 2108, Chemical and Nuclear Engineering Bldg.
Professor Sameer Shah
sameer@umd.edu
Visual Prostheses for the Blind: Development of New Methods for Assessment of Safe and Effective Retinal Stimulation
Presented by Ethan Cohen
Center for Devices and Radiological Health
U.S. Food and Drug Administration (FDA)
Visual prostheses for the blind are currently in clinical trials around the world. Here at the FDA Office of Science and Engineering Labs, my lab is involved in devising new methods for determining safe levels of electrical stimulation by retinal prostheses for the blind. We are currently trying to understand how these stimulating prostheses activate the retinal cell layers by optical and bioimpedance measurements of the eyewall, and developing novel technologies for recording from large groups of stimulated neurons. I will discuss a mass recording technique for retinal ganglion cells using a transconductance amplifier-based focal plane imaging chip.
