Navigation Links
'Dark cells' of living retina imaged for the first time
Date:2/25/2009

A layer of "dark cells" in the retina that is responsible for maintaining the health of the light-sensing cells in our eyes has been imaged in a living retina for the first time.

The ability to see this nearly invisible layer could help doctors identify the onset of many diseases of the eye long before a patient notices symptoms. The findings are reported today's issue of Investigative Ophthalmology and Visual Science.

"Our goal is to figure out why macular degeneration, one of the most prevalent eye diseases, actually happens," says David Williams, director of the Center for Visual Science and professor in the Institute of Optics at the University of Rochester. "Macular degeneration affects one in 10 people over the age of 65, and as the average age of the U.S. population continues to increase, it is only going to get more and more common. We know these dark retinal cells are compromised by macular degeneration, and now that we can image them in the living eye, we might be able to detect the disease at a much earlier stage."

In 1997, Williams' team was the first to image individual photoreceptor cells in the living eye, using a technique called adaptive optics, which was borrowed from astronomers trying to get clearer images of stars. To image the dark cells behind the photoreceptors, however, Williams employed adaptive optics with a new method to make the dark cells glow brightly enough to be detected.

The cells, called retinal pigment epithelial, or RPE cells, are nearly black, and form a layer that recharges the photoreceptor cells of the eye after they are exposed to light, Williams explains. The photoreceptors contain molecules called photopigments. When light strikes these molecules, they absorb the light and change shape, sending a signal to the brain indicating they've "seen" light.

Once a photopigment molecule absorbs light, says Williams, it needs to get recharged, so it is shuttled out of the photoreceptor and do
'/>"/>

Contact: Jonathan Sherwood
jonathan.sherwood@rochester.edu
585-273-4726
University of Rochester
Source:Eurekalert  

Page: 1 2 3

Related medicine news :

1. Make Lashes Longer, Thicker, and Darker with Latisse™
2. Ski Resorts Celebrate National Safety Awareness Week While Keeping Patrons in the Dark About Safety Plans
3. Yugma Appoints Vas Bhandarkar as Chief Executive Officer
4. Escape cancer, but age sooner? The dark side of the tumor suppressing process
5. Dr. Lisa Zdinak Announces, CO2TouchTM Brazilian Carboxytherapy - New Technology for Non-Surgical Treatment of Stretch Marks, Cellulite and Dark Undereye Circles
6. New research reveals ultraviolet light therapy is as beneficial for darker skin as lighter skin
7. Bounty Poll Reveals British Mums in the Dark Over Bisphenol-A in Baby Bottles
8. Enzyme Beneficial to Alzheimers Plays Darker Role in Other Dementia
9. Toxic Stock Syndrome Report: Many Companies Are Keeping Shareholders in the Dark on Potential Recalls, Bans, and Other Risks
10. When a Mind Begins to Disappear: A Young Familys Journey to the Dark Side
11. Highmark, Prominent Part of Pittsburgh City Skyline, to Go Dark for One Hour to Support the Environment
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Dark cells' of living retina imaged for the first time
(Date:4/21/2015)... QuickMedical, a veteran-owned leader in the ... Schiller America's line of Ambulatory and ... Vital Signs Monitors, among many other items. ... leader in the development and production of cardio-pulmonary ... cooperation with the world's leading physicians and specialists ...
(Date:4/21/2015)... Respected academic institution selects Visage 7 for ... Imaging Inc. (“Visage”), a wholly owned subsidiary of Pro ... contract with University of Florida Health — a large ... furthers the penetration of Visage 7 technology ... the North American enterprise imaging market. Visage 7 ...
(Date:4/21/2015)... 21, 2015 Approximately 75 million Americans ... U.S. Environmental Protection Agency (EPA). On top of this, ... smoke increase the level of toxins found in the ... these harmful toxins is to increase consumption of broccoli. ... highest level of glucoraphanin – a long-lasting antioxidant – ...
(Date:4/21/2015)... 21, 2015 Health Advocate™, Inc., the ... subsidiary of West Corporation, is hosting a complimentary webinar ... and the benefits of offering this service to employees. ... for managing their healthcare, it is critical that they ... effectively utilize their health benefits. Health advocates can play ...
(Date:4/21/2015)... Le Petit Retreat Day Spa in L.A. is no ... leafy, historic Larchmont neighborhood, newly renamed as the Larchmont Sanctuary ... “Disconnect to Reconnect.” Tina Figueroa, a former tech exec ... announces the new name and new vision for the spa, ... celebrate connections with Moms and their adult children. , ...
Breaking Medicine News(10 mins):Health News:QuickMedical Launches New Product Line: Schiller America 2Health News:QuickMedical Launches New Product Line: Schiller America 3Health News:Visage Imaging Signs University of Florida Health 2Health News:Visage Imaging Signs University of Florida Health 3Health News:Visage Imaging Signs University of Florida Health 4Health News:New Survey Shows Americans Are Cooking the Health Out of Broccoli 2Health News:New Survey Shows Americans Are Cooking the Health Out of Broccoli 3Health News:Health Advocate Webinar Discusses Benefits of Health Advocacy 2Health News:Larchmont Sanctuary Spa Revealed as New Name For Neighborhood Spa; New Owner, New Eco Offerings & New Theme: “Disconnect to Reconnect” 2Health News:Larchmont Sanctuary Spa Revealed as New Name For Neighborhood Spa; New Owner, New Eco Offerings & New Theme: “Disconnect to Reconnect” 3
... on First-line ART; Advocates Press,for Second-line Access, ... is,being issued by AIDS Healthcare Foundation (AHF):, ... improve access to lifesaving,AIDS treatments worldwide, AIDS Healthcare ... India as AHF/India Cares, and a broad-based,coalition of ...
... - No Human Vaccine Currently Exists Against the West ... in the US so far in 2007;,Collaboration Aims to ... Rapidly as Possible Acambis plc (Acambis) (LSE: ACM), ... signed an exclusive global,collaboration agreement with Sanofi Pasteur, the ...
... carbohydrates may help stunt the growth of prostate tumors, according ... The study, in mice, suggests that a reduction in insulin ... , This study showed that cutting carbohydrates may slow tumor ... urologist at Duke University Medical Center and lead researcher on ...
... 12 Beckman Coulter,Inc. (NYSE: BEC ), ... simplify, automate, and innovate complex biomedical testing,announced today ... chief financial officer, will present at the 2007 ... 2007, at,11:00 a.m. (ET). (Logo: http://www.newscom.com/cgi-bin/prnh/20031202/BECLOGO ...
... NightHawk,Radiology Holdings, Inc. (Nasdaq: NHWK ), the ... hospitals throughout the United States,today announced that it ... Conference, November 28, 2007, at 2:30 p.m. EST ... Mayleben, President and Chief Operating,Officer, and Glenn Cole, ...
... Nov. 12 IRIDEX,Corporation (Nasdaq: IRIX ) today ... results after the market closes on Monday, November,19, 2007. ... a,conference call with the investment community at 5:00 p.m. ... results of the quarter and other,business developments. Interested ...
Cached Medicine News:Health News:Activist Groups' Plea to Indian Prime Minister: 'Rollout Second-Line AIDS Treatment!' 2Health News:Activist Groups' Plea to Indian Prime Minister: 'Rollout Second-Line AIDS Treatment!' 3Health News:Activist Groups' Plea to Indian Prime Minister: 'Rollout Second-Line AIDS Treatment!' 4Health News:Activist Groups' Plea to Indian Prime Minister: 'Rollout Second-Line AIDS Treatment!' 5Health News:Acambis Joins Forces With Sanofi Pasteur to Develop West Nile Virus Vaccine 2Health News:Acambis Joins Forces With Sanofi Pasteur to Develop West Nile Virus Vaccine 3Health News:Acambis Joins Forces With Sanofi Pasteur to Develop West Nile Virus Vaccine 4Health News:A low-carb diet may stunt prostate tumor growth 2Health News:Beckman Coulter to Present at the Credit Suisse Global Healthcare Conference 2Health News:NightHawk Radiology Holdings, Inc. to Speak at Annual Piper Jaffray Healthcare Conference on November 28, 2007 2
(Date:4/21/2015)... April 21, 2015  St. Vincent Healthcare is ... care. Already following strict disinfection routines, St. Vincent ... to eliminate harmful germs, like Ebola, methicillin-resistant ... that can infect patients during their hospital stay. ... Logo - http://photos.prnewswire.com/prnh/20150420/199749LOGO ...
(Date:4/21/2015)... , April 21, 2015   iRhythm Technologies, ... the advancement of cardiac care, announced today that Banner ... in the U.S., will now be offering iRhythm,s ZIO ... continuous cardiac monitoring. "At Banner Health, we ... patient outcomes and services," said John Hensing , ...
(Date:4/21/2015)... 21, 2015 Workers, compensation pharmacy spending increased ... in utilization helped offset a 7 percent increase in ... today by Express Scripts (NASDAQ: ESRX ). ... Trend Report discusses the overall pharmacy trend as well ... Opioid Management Mitigates Spend Increases ...
Breaking Medicine Technology:St. Vincent Healthcare Deploys Germ-Killing Robot to Prevent Infection, Protect Patients During Hospital Visits 2St. Vincent Healthcare Deploys Germ-Killing Robot to Prevent Infection, Protect Patients During Hospital Visits 3Banner Health to Offer iRhythm ZIO Service for Continuous Cardiac Monitoring 2Banner Health to Offer iRhythm ZIO Service for Continuous Cardiac Monitoring 3Workers' Compensation Prescription Drug Spend Increased 1.9 Percent in 2014, Stabilized by Effective Utilization Management Programs 2Workers' Compensation Prescription Drug Spend Increased 1.9 Percent in 2014, Stabilized by Effective Utilization Management Programs 3Workers' Compensation Prescription Drug Spend Increased 1.9 Percent in 2014, Stabilized by Effective Utilization Management Programs 4
... 10, 2011 ThermoGenesis Corp. (Nasdaq: KOOL ... that process and store adult stem cells, said today ... Biotechnology Co., Ltd ("Beike"), a leading stem cell and ... agreement, ThermoGenesis will supply Beike with an initial stocking ...
... The Consumer Healthcare Products Association (CHPA) is pleased to ... Act, introduced today by Senator Kay Bailey Hutchison (R-Tex.) ... repeal a requirement enacted into law as part of ... that requires consumers to obtain a prescription in order ...
Cached Medicine Technology:ThermoGenesis Announces Agreement for AXP and BioArchive Cord Blood Systems With Major Chinese Stem Cell Company 2ThermoGenesis Announces Agreement for AXP and BioArchive Cord Blood Systems With Major Chinese Stem Cell Company 3ThermoGenesis Announces Agreement for AXP and BioArchive Cord Blood Systems With Major Chinese Stem Cell Company 4CHPA Applauds Introduction of The Patients' Freedom to Choose Act 2
... ARUP Laboratories is a national reference laboratory ... research and development. ARUP offers an extensive ... medical tests in clinical and anatomic pathology. ... Laboratories' clients include more than half of ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
... reference laboratory and a worldwide leader in ... an extensive test menu of highly complex ... anatomic pathology. Owned by the University of ... half of the nation's university teaching hospitals ...
... national reference laboratory and a worldwide leader ... offers an extensive test menu of highly ... and anatomic pathology. Owned by the University ... than half of the nation's university teaching ...
Medicine Products: