Pixel Club Seminar: Measurement and Analysis the Biological Retinal Response, and Adaptation to Optical Stimulus

Gil Rivnai (EE, Technion)
Tuesday, 10.8.2010, 11:30
EE Meyer Building 1061

The retina is the first nerve system tissue that processes the visual information at the biological visual system. At this research, lab experiment performed to measure the response of the retinal response, the examination was perform from spatial point of view, by simultaneous recording from many electrodes that recording the ganglion cell response from different points on the retina. First found the optimal pulse duration that led to the maximal response, and the adaptation time constant of the retina. In additional the response delay of the retina for the optimal stimulus. Series of different pulse duration and the recovery time duration stimulate the retina, to conclude the effect of those parameters on the retinal response and the adaptation characteristic. the retinal response to un uniform chess board stimulus signal examined, while focused the response at different area of the retina (off process, on process, edges). Also at this series of experiments the same parameters of the response examined, to determined the effect of the spatial and time stimulus characteristic on those parameters. We introduce the data processing and diagnostic methods of the huge amount of data that recorded, led to visual presentation of the results and the conclusions while overcoming low SNR and emphasize the retinal response. The research conclusion is that biological retinal response characterization could use for computerized bionic vision by diagnose and process the retinal response and convert it to a image, and assist the research that perform to develop vision systems.

M.Sc. thesis under the supervision of Dr. Moshe Porat for EE and Prof. Ido Prelman from Medicine.

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