Results 211 to 220 of about 47,907 (257)

Psychophysical Evaluation for Visual Prosthesis

Annual Review of Biomedical Engineering, 2008
Vision restoration through retinal, optic nerve, and cortical implants is no longer just the stuff of fantasy. The design and development of visual prostheses rapidly move from the engineering phase toward preclinical and clinical trials, yet the benchmarks to determine their efficacy in blind research subjects have received very little attention, and
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Experimental visual prosthesis

Proceedings of the Institution of Electrical Engineers, 1973
Of the methods available which seek artificially to replace the sensory input lost through blindness, the approach which should ultimately be of greatest value is that by which visual information is fed directly to the brain. The paper reviews earlier work in this field and describes a new prosthesis which gives grounds for optimism.
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REVIEW ■ : Prospects for a Visual Prosthesis

The Neuroscientist, 1997
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.
John L. Wyatt, Joseph F. Rizzo
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Implantable Imaging System for Visual Prosthesis

Artificial Organs, 2010
AbstractIn order to propose a method of intraocular imaging system for the visual prosthesis, an implantable microcamera was developed and evaluated in vivo. The microcamera was specially developed and shaped to fit the rabbit's lens capsule and encapsulated with the biocompatible silicone. To evaluate the feasibility of this novel approach, the custom‐
Qiushi Ren, Yong Sun, Xinyu Chai, Chuanqing Zhou, Chen Tao   +4 more
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Visual Prosthesis: The Interdisciplinary Dialogue.

Archives of Ophthalmology, 1972
In February 1968, Giles Brindley, an English physiologist, developed an array of 80 tiny radio receivers which were implanted onto the surface of the visual cortex of a 52-year-old blind nurse. In the succeeding weeks, Brindley was able to produce the sensation of phosphene, dot patterns in the form of a question mark and other simple letters ...
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Retinal prosthesis to aid the visually impaired

IEEE SMC'99 Conference Proceedings. 1999 IEEE International Conference on Systems, Man, and Cybernetics (Cat. No.99CH37028), 2003
In this retinal prosthesis project, a rehabilitative device is being designed to replace the functionality of defective photoreceptors in patients suffering from retinal pigmentosa and age-related macular degeneration. An implantable intraocular unit receives power and signal via a telemetric inductive link with an extraocular unit.
E. de Juan, Mark S. Humayun, S.M. Clements, Wentai Liu, E. McGucken, K. Vichienchom, S.C. DeMarco, James D. Weiland, Robert J. Greenberg   +8 more
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An epi-retinal visual prosthesis implementation

Proceedings of the First Joint BMES/EMBS Conference. 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Annual Fall Meeting of the Biomedical Engineering Society (Cat. No.99CH37015), 2003
Retinitis pigmentosa and age-related macular degeneration leads to blindness through progressive loss of retinal photoreceptors. This paper describes an epi-retina visual prosthesis intended to provide electrical stimulation of the remaining, post-degenerative retina in order to recover some useful vision.
Wentai Liu, Mark S. Humayun, James D. Weiland, K. Vichienchom, S.C. DeMarco, M. Clements   +5 more
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Electrophysiology Techniques in Visual Prosthesis

2018
Research in the field of visual prosthesis is advancing quickly with several groups around the world joining efforts to produce more effective and safe implants. In particular, new stimulation strategies are being investigated to elicit more meaningful percepts of light and to safely increase the visual acuity achieved by these devices.
Alejandro Barriga-Rivera, Gregg J. Suaning   +1 more
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An embedded approach to visual prosthesis chip

2015 International Conference on Electrical Engineering and Information Communication Technology (ICEEICT), 2015
Age related macular degeneration and retinitis pigmentosa are two most common cause for loss of sight. In this paper an architecture of a processor has been described for 64 electrode implantable retinal prosthesis chip. The processor takes serial data and generates PWM signals according to the serially received data. This paper describes basically the
Md. Shahjahan, Md. Syadus Sefat
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Simulated phosphene model for visual prosthesis

2012 5th International Conference on BioMedical Engineering and Informatics, 2012
Two simulated phosphene models were proposed in this paper. Model I was based on uniform or Gaussian round or square spots which arranged in rectangle or hexagonal arrays. Model II was based on partial clinical experiment data of one optic nerve prosthesis research. Numbers, letters and Chinese characters were pixelated by these models. The feasibility
Qiushi Ren, Kun Yang, Yongji Wang, Ying Zhao, Bo Pang   +4 more
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