Navigation Links
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 artificial retina-developed and manufactured in partnership with Second Sight Medical Products, Inc., of Sylmar, Calif.

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.


'"/>

Source:University of Southern California


Page: 1 2

Related biology news :

1. Different microarray systems more alike than previously thought
2. Oceans more vulnerable to agricultural runoff than previously thought, study finds
3. Atmosphere may cleanse itself better than previously thought
4. Katrina floodwaters not as toxic to humans as previously thought, study says
5. The diversity of marine life in the Gulf of Maine region is much greater than previously thought
6. Memory loss affects more of the brain than previously thought
7. Can you hear me now? Scientists find previously unknown receptors on adult stem cells
8. Sports cheats beware -- new test detects previously undetectable drug
9. Brain works more chaotically than previously thought
10. Mans earliest direct ancestors looked more apelike than previously believed
11. Liver regeneration may be simpler than previously thought
Post Your Comments:
(Date:9/30/2014)... Mass. , Sept. 30, 2014 /PRNewswire/ ... control solutions for the biotech and power ... its new RECONN Bioprocess Manager, an easy-to-use ... solution geared towards bioprocess development laboratories. ... have disparate bioreactor and analyzer systems. Accessing ...
(Date:9/30/2014)... threats in today,s ocean. From overfishing and pollution ... ecosystems are disappearing at unprecedented rates around the ... surrounding the island of Moorea in French Polynesia ... coral guard-crabs. New research from the National Museum ... McKeon and the museum,s predoctoral fellow Jenna Moore ...
(Date:9/30/2014)... who suffer from asthma may think there,s not a ... properly taking medications and avoiding allergic triggers. , ... of Allergy, Asthma and Immunology , the scientific publication ... (ACAAI), asthma sufferers can learn lessons about managing their ... the Annals article improved her asthma once she and ...
Breaking Biology News(10 mins):Spectra Automation Introduces RECONN Bioprocess Manager 2Smithsonian scientists discover coral's best defender against an army of sea stars 2Asthma symptoms kicking up? Check your exposure to air pollution 2
... become more crucial to fundamental global issues, including ... Diego,s Jacobs School of Engineering,s top ranked bioengineering ... of this field. The Siebel Foundation has ... $2 million endowment to fund fellowships for some ...
... Ann Arbor, Mich. University of Michigan scientists ... more precise way for medics and fellow soldiers in ... and a drug that limits morphine,s dangerous side effects. ... particles capable of carrying the drugs into the body. ...
... Service Eastern Forest Environmental Threat Assessment Center (EFETAC) ... Tools (CRAFT), a user-friendly, Web-based support system that ... land management decisions. CRAFT offers a ... risks and tradeoffs associated with different management scenarios. ...
Cached Biology News:Siebel Foundation awards top UC San Diego bioengineering graduate students 2Siebel Foundation awards top UC San Diego bioengineering graduate students 3Siebel Foundation awards top UC San Diego bioengineering graduate students 4Nanoparticle-based battlefield pain treatment moves a step closer 2Forest Service Web-based tool helps manage environmental risk 2
(Date:9/30/2014)... , September 30, 2014 ... browsing of chemistry in documents ... solutions and consulting services for life science research, ... and generate Markush structures from documents. ... intellectual property, however generating and understanding Markush structures ...
(Date:9/30/2014)... Genedata, a leading provider ... and related life science research, today announced ... Selector as its host-pathogen data analysis platform ... a European consortium dedicated to improving the ... anti-fungal drug therapies. Genedata Selector supports this ...
(Date:9/30/2014)... OriginOil Inc. (OTC/QB: OOIL), developer of ... clean up large quantities of water, announced today that ... on the launch of the company's CLEAN-FRACâ„¢ industrial grade ... partner STW Resources . , Immediately upon startup, ... (bpd) and achieved a 99.8% reduction in Turbidity on ...
(Date:9/30/2014)... Sept. 30, 2014  KemPharm, Inc., a clinical-stage ... development of proprietary new molecular entity (NME) prodrugs, ... Trademark Office (USPTO) issued U.S. Patent No. 8,816,083 ... Acid, Benzoic Acid Derivatives and Heteroaryl Carboxylic Acid ... Use Thereof." The patent, which extends ...
Breaking Biology Technology:ChemAxon Introduces ChemCurator for Chemical Information Extraction and Markush Structure Creation 2FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 2FUNGITECT Consortium Adopts Genedata Selector as Data Analysis Platform for Anti-fungal R 3OriginOil, Inc. Report to Shareholders: Blue Gold in West Texas 2KemPharm, Inc. Receives Patent from the USPTO for Novel Prodrug of Hydromorphone, KP511 2
... Ill. University of Illinois engineers have developed ... that could shrink integrated circuits and expand microelectronics. ... multiple transistors and electronic components together to perform ... boards traditionally are made from pre-fabricated metal wires ...
... ,, NEW YORK , July 15 Senesco Technologies (NYSE Amex: SNT ) announces the following ... What:  LHA Life Sciences & Med Tech Day 2010 Presentation , , ... Eastern , , , ... How:  Live over the Internet -- Simply log on to the web at the ...
... , QUEBEC CITY , July 14 ... TSX: AEZ) (the "Company"), a late-stage drug development ... announced that its partner, Keryx Biopharmaceuticals, Inc. ("Keryx") ... the U.S. Food and Drug Administration ("FDA") for ...
Cached Biology Technology:Small wires make big connections for microelectronics 2Small wires make big connections for microelectronics 3Webcast Alert: Senesco Technologies (SNT) Announces the LHA Life Sciences & Med Tech Day 2010 Presentation 2Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 2Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 3Aeterna Zentaris Announces Perifosine Has Received Orphan-Drug Designation for the Treatment of Neuroblastoma 4
... acid analysis standard is a ... salts; molecular weights range from ... is provided for use with ... the organic acid analysis kit ...
... demonstrated that oxidative stress is involved in ... stress is the condition in which an ... exist leading to the damage of a ... stress is through several antioxidant systems4 that ...
... matrix for the extraction of unwanted ... other macromolecules, Applications: ,Reducing octyl glucoside ... interaction of pure β-adrenergic receptor and ... SDS in 6 M urea/0.05 mM ...
Values of steady state parameters for enzyme activities are determined....
Biology Products: