Read e-book online Artificial Sight: Basic Research, Biomedical Engineering, PDF

By Hossein Ameri, James D. Weiland, Mark S. Humayun (auth.), Mark S. Humayun, James D. Weiland, Gerald Chader, Elias Greenbaum (eds.)

ISBN-10: 0387493298

ISBN-13: 9780387493299

ISBN-10: 038749331X

ISBN-13: 9780387493312

Artificial sight is a frontier zone of recent ophthalmology combining the multidisciplinary talents of surgical ophthalmology, biomedical engineering, organic physics, and psychophysical checking out. Many clinical, engineering, and surgical demanding situations has to be surmounted earlier than frequent useful functions should be discovered. The objective of Artificial Sight is to summarize the state of the art study during this fascinating zone, and to explain many of the present techniques and projects which may support sufferers in a scientific atmosphere.

The Editors are lively researchers within the fields of man-made sight, biomedical engineering and organic physics. they've got got various expert awards and popularity for his or her paintings. the synthetic sight crew on the Doheny Eye Institute, led by way of Dr. Mark Humayun, is a global chief during this quarter of biomedical engineering and medical research.

Key Features

  • Introduces and assesses the state-of-the-art for a vast viewers of biomedical engineers, biophysicists, and medical researchers
  • Describes advances in microelectronics, microfabrication, surgical implantation, and psychophysical checking out of visible prostheses
  • Outlines the promise of synthetic sight and the demanding situations that needs to be met

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Additional info for Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances

Example text

With our electrodes, 50 NC/Phase would give a charge density of approximately 110 C/cm2 and the work of McCreery et al. suggests that this combination would not be injurious. Our electrodes were not in direct contact with the neural tissue. Therefore, the limit of electrical charge density may be expected to be higher than that with epiretinal stimulation. Indeed, Nakauchi K. et al. [15] reported that for 100 m Pt electrode by STS, retinal tissue was not damaged by a current up 38 Fujikado et al.

Our electrodes were not in direct contact with the neural tissue. Therefore, the limit of electrical charge density may be expected to be higher than that with epiretinal stimulation. Indeed, Nakauchi K. et al. [15] reported that for 100 m Pt electrode by STS, retinal tissue was not damaged by a current up 38 Fujikado et al. 4. Amplitude of the EEP induced by STS in rabbit. A typical EEP waveform evoked by 500 uA stimulation. P2–N2 amplitude plotted in relation to the stimulus intensity in rabbit n = 6 .

Richard G, Feucht M, Bornfeld N, et al. Multicenter study on acute electrical stimulation of the human retina with an epiretinal implant: clinical results in 20 patients. ARVO. Fort Lauderdale, USA, 2005. 52. Humayun MS, Weiland JD, Fujii GY, et al. Visual perception in a blind subject with a chronic microelectronic retinal prosthesis. Vision Res 2003; 43(24):2573–81. 53. Hesse L, Schanze T, Wilms M, Eger M. Implantation of retina stimulation electrodes and recording of electrical stimulation responses in the visual cortex of the cat.

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Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances by Hossein Ameri, James D. Weiland, Mark S. Humayun (auth.), Mark S. Humayun, James D. Weiland, Gerald Chader, Elias Greenbaum (eds.)


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