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:3/31/2015)... , March 31, 2015   Guidepoint , a ... of the Post-Surgical Pain Management TRACKER, part of the ... usage trends in the medical device and therapeutics markets. ... data including treatment volumes, market share, and adoption rates ... associated with joint surgery. The Post-Surgical Pain ...
(Date:3/24/2015)... DUBLIN , Mar. 24, 2015 Research and ... addition of the "Global Iris Recognition Market 2015-2019" ... forecast the Global Iris Recognition market to grow at ... This report covers the present scenario and ... for the period 2015-2019. To calculate the market size, ...
(Date:3/24/2015)... PALM BEACH GARDENS, Fla. , March 24, ... of biometric identity management solutions, today announced that ... enabling premium clothing accessory retailer Goorin Bros ... login. The Crossmatch biometrics-based solution secures access to ... customers from the increased risk of data breaches. ...
Breaking Biology News(10 mins):Guidepoint Launches Post-Surgical Pain Management TRACKER 2Guidepoint Launches Post-Surgical Pain Management TRACKER 3Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2
... Cancer Cell describes a small molecule inhibitor of polo-like kinase1 ... cancer therapy. The compound, ON01910, is a potent inhibitor of ... toxicity. The results of this study have led to clinical ... Plk1 is a molecule that plays a key role in ...
... proteins called phosphatases play a key role in the ... fruit flies and mice by researchers at the University ... collaboration with scientists at the Salk Institute, La Jolla, ... stem cells and for silencing expression of neuronal genes ...
... toward understanding the regulation of blood stem cells and ... research study published in the February issue of Developmental ... to examine the role of a key gene known ... from this research will be useful for future studies ...
Cached Biology News:New drug shows promise as powerful anticancer agent 2New insight into regulation of blood stem cells 2
(Date:4/23/2015)... 23, 2015  Propanc Health Group Corporation (OTCBB: ... on the development of cancer treatments for patients ... product includes PRP, a patented formulation consisting of ... well as the enzyme amylase designed to synergistically ... combination of anti-cancer agents working in combination with ...
(Date:4/23/2015)... FRANCISCO, CA (PRWEB) April 23, 2015 ... delivery, today announced that the United States Patent and ... the Company’s NANOPOR™ technology. US Pat. ... covers Delpor’s microfabricated drug delivery device for ... Delpor’s proprietary NANOPOR™ technology for the sustained (zero-order) release ...
(Date:4/22/2015)... April 22, 2015 /PRNewswire/ - BioAmber Inc. (NYSE and EURONEXT Paris:BIOA) today announced ... quarter 2015 on Thursday, May 7, 2015 after the ... webcast and conference call for 4.30 pm ET (1.30 ... Live audio of the conference call will be webcast ... members of the news media and the general public. ...
(Date:4/22/2015)... , April 22, 2015 Steep ... analytics, announced today that it has opened an ... continued growth and expansion.  The common stock investment ... Section 506(c), a law intended to encourage funding ... Prior to 506(c), small businesses largely relied on ...
Breaking Biology Technology:Early Stage BioTech offers Plenty of Risk; Propanc Health Group Analyst Brief Issued by BrokerBank Securities, Inc. 2Delpor, Inc. Announces the Issuance of 2 New US Patents Based on its Nanopore Technology which Enables the Sustained Release of Drugs from a Small Implant Device 2Delpor, Inc. Announces the Issuance of 2 New US Patents Based on its Nanopore Technology which Enables the Sustained Release of Drugs from a Small Implant Device 3BioAmber Announces Webcast of Fiscal First Quarter 2015 Financial Results 2Steep Hill Launches $5M Limited Stock Offering 2Steep Hill Launches $5M Limited Stock Offering 3
... Amex: NBS ) ("NeoStem" or the "Company"), an ... today announced that the Company and its wholly-owned subsidiary, Progenitor ... conferences: the 2011 World Stem Cell Summit, the AABB Annual ... 2011 World Stem Cell Summit – ...
... Oct. 4, 2011 Exosome Diagnostics, a leading ... in personalized medicine, today announced the appointment of ... Donovan, M.D., Ph.D., as chief medical officer, and ...  Raphael Bueno, M.D., associate chief of cardiothoracic surgery ...
... have discovered two early-stage phases of carbon nanotube growth ... tangle of tube growth that ultimately yields to orderly ... in the latest edition of the journal Nanotechnology ... Professor of Physics Zhifeng Ren and researcher Dr. Hengzhi ...
Cached Biology Technology:NeoStem Announces Participation in Multiple October Conferences 2NeoStem Announces Participation in Multiple October Conferences 3NeoStem Announces Participation in Multiple October Conferences 4Exosome Diagnostics Announces Additions to Management and Scientific Advisory Board as Company Expands Clinical Validation Studies in Oncology 2Exosome Diagnostics Announces Additions to Management and Scientific Advisory Board as Company Expands Clinical Validation Studies in Oncology 3Exosome Diagnostics Announces Additions to Management and Scientific Advisory Board as Company Expands Clinical Validation Studies in Oncology 4Exosome Diagnostics Announces Additions to Management and Scientific Advisory Board as Company Expands Clinical Validation Studies in Oncology 5Boston College Researchers discover 2 early stages of carbon nanotube growth 2
BD BioCoat Collagen IV 150 mm Culture Dishes...
Polymerase (RNA) II (DNA directed) polypeptide L...
Chicken Anti-Human DNA-directed RNA Polymerase II 7.6 Kd Polypeptide (POLR2L Polyclonal AntibodyOther Sub-Family: not assigned-Other Applications: ELISA, Western Blot...
The BD CBA Human Apoptosis Kit can be used to quantitatively measure,cleaved PARP, Bcl-2, and active Caspase-3 protein levels in a single sample. The,Kit performance has been optimized for analysis o...
Biology Products: