Multi-phasic microphotodiode retinal implant and adaptive...

A - Human Necessities – 61 – N

Patent

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A61N 1/05 (2006.01) A61F 2/14 (2006.01) A61F 9/08 (2006.01) A61N 1/36 (2006.01)

Patent

CA 2222741

An artificial retina device and a method for stimulating and modulating its function is diclosed. The device is comprised of plural multi-phasic microphotodiode subunits, which, when surgically implanted into the subretinal space, may allow useful formed articifial vision to develop. One device, called an MMRI-4 (8), is configured in a flattened cubic shape and transduces light into electric currents to stimulate the retina. The MMRI-4 comprises two subunits in a PiN configuration (10a) and two subunits in an NiP configuration (10b), both present on each of the flattened sides, thereby allowing induced sensations regardless of which side faces incident light. Filter layers (20, 22) disposed on the PiN and NiP configurations allow for visible and infrared light respectively to induce currents. An Adaptive Imaging Retinal Stimulation System (AIRES), with a Projection and Tracking Optical System (PTOS), which may be worn as a headset, is also disclosed.

L'invention porte sur un dispositif rétinien artificiel et sur un procédé de stimulation et de modulation de son fonctionnement, comportant une série de sous-unités constituées de microphotodiodes à plusieurs phases qui, après implantation chirurgicale dans l'espace subrétinien, peuvent permettre le développement d'une vision artificielle utile. L'un des dispositifs, dit MMRI-4 (8), qui se présente sous la forme d'un cube aplati, transforme la lumière en courants électriques qui stimulent la rétine. Le MMRI-4 comporte deux sous-unités dans une configuration PiN (10a) et deux sous-unités dans une configuration NiP (10b) placées sur chacun des côtés aplatis, ce qui permet de donner naissance à des sensations induites quelque soit la face latérale recevant la lumière incidente. Des couches filtrantes (20, 22) placées sur les configurations PiN et NiP permettent la production de courants à partir du spectre visible et des IR. L'invention porte également sur un système de stimulation rétinienne par imagerie adaptative (AIRES) équipé d'un système optique de projection et de poursuite (PTOS) pouvant se présenter sous forme de lunettes.

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