Six previously blind patients detect light, motion, identify objects with retinal prostheses


Researchers from the University of Southern California and the Doheny Eye Institute's Doheny Retina Institute will be presenting data on the first six patients implanted with an intraocular retinal prosthesis-more popularly referred to as an artifici

(I-Newswire) May 3, 2005 - According to Mark Humayun, professor of ophthalmology at the Keck School of Medicine and the lead investigator on the project, all six of the previously blind patients have been able to detect light, identify objects in their environment, and even perceive motion after implantation with the epiretinal device.

Data collected as of November of 2004 showed that the six patients-who had been implanted with a single prosthesis in their "worse eye" for between 5 and 33 months-were able to "localize the position of, or count the number of, high contrast objects with 74 to 99 percent accuracy," Humayun says. In addition, they could discriminate simple shapes-i.e., figure out the spatial orientation of a bar or the capital letter L-with 61 to 80 percent accuracy.

The researchers also noted that when there is no electricity running through the device, the subjects do not show any improvement in perceptual acuity, "suggesting that electrical stimulation did not improve the health or function of the retina."

Thus far, participants in the study have been people with little or no sight perception due to the degenerative eye disease retinitis pigmentosa (RP). Ultimately, however, the device is likely to be used for the millions of people suffering from age-related macular degeneration, or AMD, as well. In fact, notes Humayun, there are 25 million people across the globe, including 6 million in the United States alone, who have been blinded, or are severely visually impaired, due to disease like RP and AMD. By 2020, that figure is expected to double, creating a virtual vision-loss epidemic.

Both AMD and RP destroy vision by annihilating the retinal cells that allow light to be translated into recognizable images.

Second Sight's intraocular retinal prosthesis is taking the first step to replacing those cells with its device, a 4-by-4 grid of platinum electrodes embedded in silicone rubber. The electrodes are wirelessly stimulated through an external controller hooked up to a head-mounted video camera.

This study is being conducted under a Food and Drug Administration Investigational Device Exemption (IDE), and is funded by Second Sight Medical Products, Inc., Research to Prevent Blindness, and the Fletcher Jones Foundation.

M.S. Humayun, R. Freda, I. Fine, A. Roy, G. Fujii, R.J. Greenberg, J. Little, B. Mech, J.D. Weiland, E. de Juan, Jr., "Implanted Intraocular Retinal Prosthesis in Six Blind Subjects," ARVO 2005, Retinal Prosthesis I, Monday, May 2, 12:15 p.m.

Contact: Sarah Huoh
shuoh@usc.edu
323-442-2830
University of Southern California
http://www.usc.edu



Company Contact Information




Archive

May 3, 2005

If you have questions regarding information in this press release contact the company listed above. I-Newswire.com is a press release service and not the author of this press release. The information that is on or available through this site is for informational purposes only and speaks only as of the particular date or dates of that information. As some companies / PR Agencies submit their press releases once per week/month or quarter, make sure check the official company website for accurate release dates as our site displays the I-Newswire.com distribution date only. We do not guarantee the accuracy or completeness of information on or available through this site, and we are not responsible for inaccuracies or omissions in that information or for actions taken in reliance on that information.


Related Releases

Relish The Interesting Stories Of Amar Chitra Katha At Unbelievable Price On Infibeam

Get the best collection of Indian stories published by Amar Chitra Katha at infibeam, an online shopping website at an unbelievable additional 15% off.

Lamb of God Partners with Specticast for Worldwide Theatrical Distribution of "As The Palaces Burn" Documentary Film

As The Palaces Burn is a film about metal icons Lamb of God, the zealous passion of their fan base, and the gut-wrenching manslaughter trial of lead singer Randy Blythe.

Mervik Haums Publishes Free Infographic To Explain Affiliate Marketing

An Infographic is by far the best way to demonstrate any idea or marketing plan. As it is a visual representation of information, data and knowledge, the viewer get a very clear idea about whatever the graphic is built for.

86.7% Of People Think It Is A Good Time To Be Investing In Adelaide Property

Adelaide Finance Brokers Urbantech Group recently ran a survey on their website. They asked the simple question: "Do you think it is a good time to be i

The Metro Joins The Hunt For Santa With Ted Burns

Ted Burns, the host of Third Degree, is searching for Santa, also known as the Yuletide Yobbo. And now he's got the support of the Metro, the UK's leading free newspaper.

Latest 10 Headlines

Broken Head Holiday Park Special Offers 2014

Broken Head Holiday Park has made it even easier for families, couples and individuals to afford to take a break thanks to a new range of special offers available on their website.

Australian Government's Frustration on RBA Stance 'risks Central Bank's Independence' States Alocoveritas' Earl Reginald Stevenson

"The question here is not should rates be lower or higher, but is it worth the risk of impugning the independence of the Reserve Bank," said Alcoveritas' Senior Managing Partner, Earl Reginald Stevenson in Sydney, Australia.

Broken Head Holiday Park Gear Up With New Activities List

Byron Bay camping and caravan resort, Broken Head Holiday Park, has introduced a new list of activities to their website which holiday makers can look forward to over the coming months.

Ingram Content Group and Hachette Livre Offer Titles from the Bibliothèque Nationale De France

Ingram Content Group Inc. today announced a print-on-demand initiative that integrates Hachette Livre's publishing program with Ingram's on-demand print and distribution solutions to make thousands of Bibliothèque nationale de France (BnF).

Pay Per Click Jobs Available At Manav Revolution Infotech

PAY PER CLICK Jobs is an internet advertising model used to direct traffic to websites in which advertisers pay the website owner when the ad is clicked. In simple words "the amount spent to get an ad clicked."

How Can I Get White Teeth In Bonita Springs, Fl

Here are the numerous advantages of teeth whitening and the way it will enhance someone's life.

Resume Myths Vs. Facts Infographic by Almagreta Outlines An Ideal Resume

Almagreta just released Resume Myths vs. Facts infographic which highlights resume writing misconceptions and provide hard facts from HR officers, recruiters and career coaches to help job seekers land the job.

Transportation of Chemicals - Market Requirements

Due to the exacting standards, transportation of chemicals is not an easy project. A rapidly growing chemical market creates new opportunities for logistics companies but it also systematically requires higher requirements.

BroadConnect Telecom Provides Automatic Call Distribution (ACD) and Queuing

Broadconnect Telecom, the leading telecommunication provider in USA and Canada provides automatic call distribution and queuing.

Chic Blueprint Started Shirt Distribution Center in Karolbagh New Delhi

Chic Blueprint is a global online casual shirts wholesaler and retailer own label product lines across menswear with approximately 500 new product are being introduced each month.

Helpful Articles

Increase Website Traffic By Using Press Releases
Write A Press Release For Big Time News
Get Backlinks From Press Releases
How To Write A Press Release Quick And Easy
Choosing A Press Release Service
Writing A News Press Release
Get More Traffic From Press Releases
Is A Press Release Service Worth It?
Effective Press Release Distribution
Create a Successful Online Press Release
Submit A Press Release and Get More Traffic
How To Write A Press Release
Check This Before You Send A Press Release
Using A Press Release Service For Your News Release

Our Services:

Submit Your Free Press Release Now.

Open Now:
Online Classified Ads at I-Newswire.com
Job Search Engine at I-Newswire.com
Car Search Engine at I-Newswire.com
Real Estate Search at I-Newswire.com
Website News Releases, Announcements and Updates

Other Cool Sites:
Breaking and Latest Automotive News
Learn the secrets on how to become an alpha male and how to meet girls on facebook at Dating-To-Mating.com. Check out the best spinner and instant article factory for your content writing needs.