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REVIEW : Prospects for a Visual Prosthesis

Keck Neural Prosthesis Center, Department of Ophthalmology

John Wyatt

Keck Neural Prosthesis Center, Research Laboratory of Electronics, Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge, Massachusetts

Diseases of the retina and optic nerve are common causes of irreversible blindness. Given the lack of effective treatments, several laboratories are utilizing microelectronic technology to develop either a cortical or retinal prosthesis. Each strategy offers certain advantages, but both face numerous and formidable chal lenges. Consequently, a clinically useful device of either type is still conceptual. The technological means to build prostheses are available, but the ultimate obstacle is the integration of the technology with the brain. This article reviews achievements of the ongoing efforts and focuses on our project to develop a retinal prosthesis. NEUROSCIENTIST 3:251-262, 1997

Key Words: KEY WORDS Vision • Prosthesis • Retina • Visual cortex • Blindness • Electrical stimulation

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