Retinal Prosthesis – Helping the blind to see again


We are developing an optical system for a parallel delivery of information and energy to tens of thousands of pixels in the implant. This system permits normal eye scanning to observe a large field of view, as opposed to “hard wiring” of a video camera to the retinal stimulating array using a single emitter-receiver link. The image from a goggles-mounted video camera is processed in a portable microcomputer and then projected with a pulsed IR LED-LCD array onto the retina. The retinal implant has an array of powered photodiodes converting pulses of light into pulsed electrical current using a power from an intraocular photovoltaic battery.

The leading cause of blindness in developed countries is Age-related Macular Degeneration (AMD), which results in severe and irreversible loss of vision for over two million Americans. The disease causes deterioration of the photoreceptor cells in the central part of the retina, and currently, there is no cure.

Source:  Stanford

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