+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Multi-phasic microphotodiode retinal implant and adaptive imaging retinal stimulation system

Multi-phasic microphotodiode retinal implant and adaptive imaging retinal stimulation system

Official Gazette of the United States Patent & Trademark Office Patents 1246(2), May 8

An artificial retina device and a method for stimulating and modulating its function is disclosed. The artificial retina device is comprised of plural multi-phasic microphotodiode subunits. In persons suffering from blindness due to outer retinal layer damage, a plurality of such devices, when surgically implanted into the subretinal space, may allow useful formed artificial vision to develop. One device, called a MMRI-4, transduces light into electric currents to stimulate the retina. The four microphotodiode subunits of the MMRI-4 are oriented so that each flattened sides of the MMRI-4 has two subunits in a PiN configuration and two subunits in a NiP configuration. Filter layers disposed on the PiN configuration will allow visible light to induce a PiN current, and filter layers disposed on the NiP configuration will allow infrared light to induce a NiP current. By projecting real or computer controlled visible light images, and computer controlled infrared light images or illumination, simultaneously or in rapid alternation onto the MMRI-4s, the nature of induced retinal images may be modulated and improved. An Adaptive Imaging Retinal Stimulation System (AIRES), with a Projection and Tracking Optical System (PTOS), which may be worn as a headset is used for this purpose, and is also disclosed. Color images may even be induced by programming the stimulating pulse durations and frequencies of the AIRES system.

(PDF 0-2 workdays service: $29.90)

Accession: 035349410

Download citation: RISBibTeXText

Related references

Multi-phasic microphotodetector retinal implant with variable voltage and current capability. Official Gazette of the United States Patent & Trademark Office Patents 1258(2), May 14, 2002

The subretinal implant: can microphotodiode arrays replace degenerated retinal photoreceptors to restore vision?. Ophthalmologica. Journal International D'ophtalmologie. International Journal of Ophthalmology. Zeitschrift für Augenheilkunde 216 Suppl 1: 8-20; Discussion 52-3, 2002

Development of a silicon retinal implant Epiretinal stimulation of retinal ganglion cells in the rabbit. Investigative Ophthalmology & Visual Science 35(4): 1380, 1994

Adaptive optics retinal imaging: applications for studying retinal degeneration. Archives of Ophthalmology 126(6): 857-858, 2008

Responses of rabbit retinal ganglion cells to subretinal electrical stimulation using a silicon-based microphotodiode array. Investigative Ophthalmology & Visual Science 52(13): 9353-9361, 2012

The effect of increased intraocular pressure on retinal potentials induced by subretinal microphotodiode array electrical stimulation. Investigative Ophthalmology & Visual Science 37(3): S349, 1996

Charge densities needed for induction of retinal and cortical potentials by stimulation with subretinal electrodes and implanted semiconductor microphotodiode arrays. Investigative Ophthalmology & Visual Science 37(3): S349, 1996

High-resolution imaging of living retina through optic adaptive retinal imaging system. Yan Ke Xue Bao 18(3): 131-135, 2004

Topography of patchy retinal whitening during acute perfused retinal vein occlusion by optical coherence tomography and adaptive optics fundus imaging. European Journal of Ophthalmology 21(5): 653-656, 2011

Retinal engineering Engrafted retinal cells of each functional class migrate to and implant in the proper retinal stratum. Society for Neuroscience Abstracts 25(1-2): 1311, 1999

A dual-modal retinal imaging system with adaptive optics. Optics Express 21(24): 29792-29807, 2014

High-resolution retinal imaging with micro adaptive optics system. Applied Optics 50(22): 4365-4375, 2012

Integrated adaptive optics optical coherence tomography and adaptive optics scanning laser ophthalmoscope system for simultaneous cellular resolution in vivo retinal imaging. Biomedical Optics Express 2(6): 1674-1686, 2011

System design considerations to improve isoplanatism for adaptive optics retinal imaging. Journal of the Optical Society of America. A, Optics, Image Science, and Vision 27(11): A37-A47, 2011

Optimization of the open-loop liquid crystal adaptive optics retinal imaging system. Journal of Biomedical Optics 17(2): 026001-026001, 2012