Cortical Activation Via an Implanted Wireless Retinal Prosthesis
نویسندگان
چکیده
منابع مشابه
Cortical activation via an implanted wireless retinal prosthesis.
PURPOSE To demonstrate local cortical activations in the primary visual cortex of the cat as a result of retinal electrical stimulation by means of a completely wireless-controlled, implantable retinal prosthesis in a series of acute experiments. METHODS The transfer of energy to drive the device and signals to activate any combination of 25 retinal electrodes was achieved completely wireless...
متن کاملDifferential recovery of the electroretinogram, visually evoked cortical potential, and electrically evoked cortical potential following vitrectomy: implications for acute testing of an implanted retinal prosthesis.
To determine the extent to which electrophysiologic tests of the afferent visual pathway are affected by vitrectomy, the procedure was performed in 15 eyes of 11 adult Dutch-belted rabbits. An electroretinogram (ERG), visually evoked cortical potential (VECP), and electrically evoked cortical potential (EECP) were obtained preoperatively and sequentially after surgery. For electrical stimulatio...
متن کاملRetinotopic to Spatiotopic Mapping in Blind Patients Implanted With the Argus II Retinal Prosthesis.
Purpose To quantify the precision of mapping from retinotopic (retina-centered) to spatiotopic (world-centered) coordinates in blind humans implanted with a retinal prosthesis device. Additionally, to demonstrate that an eye tracker can be calibrated on sightless patients based on the percept from a visual implant. Methods We directly activated epiretinal electrodes to create retinotopic stim...
متن کاملTechniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis
Retinal prostheses for the treatment of certain forms of blindness are gaining traction in clinical trials around the world with commercial devices currently entering the market. In order to evaluate the safety of these devices, in preclinical studies, reliable techniques are needed. However, the hard metal components utilised in some retinal implants are not compatible with traditional histolo...
متن کاملAn analysis of observer‐rated functional vision in patients implanted with the Argus II Retinal Prosthesis System at three years
OBJECTIVE The purpose of this analysis was to compare observer-rated tasks in patients implanted with the Argus II Retinal Prosthesis System, when the device is ON versus OFF. METHODS The Functional Low-Vision Observer Rated Assessment (FLORA) instrument was administered to 26 blind patients implanted with the Argus II Retinal Prosthesis System at a mean follow-up of 36 months. FLORA is a mul...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2005
ISSN: 1552-5783
DOI: 10.1167/iovs.04-0924