Programm                 "Degeneration und Regeneration– Grundlagen, Diagnostik und Therapie"

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Intraocular Vision Aid: Microoptic for Imaging of Micordisplays Inside the Eye onto the Retina

Eix I., Stork W.
Universität Karlsruhe, Institut für Technik der Informationsverarbeitung, Karlsruhe, Deutschland

Purpose: Often, the retinal function is still intact in a of blindness suffering person. This is given, when vision is only reduced due to a opaque cornea. In that case, a certain amount of vision can be given back by implanting a miniaturized vision aid into the eye. The vision aid consists out of a receiver module, a microdisplay, and an imaging optic. Restricted by the little dimensions between the display and the retina, as well as due to the reduced amount of pixel available on the display, it is not possible to implement the imaging optic as plain bulk optics.
Method: Instead of imaging a linear image of the display, a spatial dependent variation of the pixel size is implemented. The photoreceptor density is used to weight the pixel distribution on the retina. A tripartite distribution is realized. Around 56% of the available pixel are imaged into the central parts of the retina of ±2°. This is done to realize a high visual resolution in the areas close to the optical axis. Another 37% of the pixel , with a lower resolution, are used to fill up the area of 10° of the optical axis. To prevent a tunnel view, the remaining pixel are distributed to an area of up to 40° of the optical axis.
Results: The implementation of a spatial variant distribution employs a better usage of the by the display given and thus restricted amount of pixel. Thus, details in the

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