Featured Research

from universities, journals, and other organizations

New Technique For Mapping Blood Supply In Retina Increases Safety, Comfort Of Exams

Date:
October 10, 2008
Source:
Optical Society of America
Summary:
Anyone who has ever been examined for eye disease involving blood flow in the retinal capillaries--as people with diabetes routinely are to assess vision loss associated with their disease-- remembers the test: the injection, the bright lights, the discomfort.

Anyone who has ever been examined for eye disease involving blood flow in the retinal capillaries—as people with diabetes routinely are to assess vision loss associated with their disease— remembers the test: the injection, the bright lights, the discomfort.

Related Articles


Now researchers from the University of Indiana offer a new non-invasive technique using near-infrared light that allows them to see blood flow within all capillaries of the light sensitive tissues in the retina at the back of the eye. With it, they can detect changes in blood vessels while the patient remains shot-free and relatively comfortable. “Our work enables us to measure the smallest capillaries using near infrared light, without injection of contrast agents,” explains Stephen Burns, who is leading the research effort at Indiana, “and thus it holds significant promise for safely investigating retinal vascular changes in disease.”

The traditional means of visualizing the retina is known as fluorescein angiography. It involves a shot in the arm of fluorescein dye that travels within seconds through the blood to the eye where it highlights flow and vessel integrity in the small capillaries in the retina. A series of photographs is taken to document the capillary network and reveal defects or changes. If vessels are damaged or abnormal, dye leaks out. Many shot-adverse patients find the procedure repellent enough that they put off getting these crucial eye exams.

To develop a patient-friendly alternative, Burns and his colleagues turned to adaptive optics that uses a confocal scanning laser opthalmoscope to produce retinal images in real time. A mirroring system helps guide the imaging beam to build a montage of the area being investigated. “In general, we could generate maps within a single imaging region without operator intervention once frames were chosen for alignment,” Burns says.

Medical research is a cornerstone of Frontiers in Optics 2008 (FiO), the 92nd Annual Meeting of the Optical Society (OSA), being held Oct. 19-23 at the Riverside Convention Center in Rochester, N.Y. FiO 2008 will take place alongside Laser Science XXIV, the annual meeting of the American Physical Society’s Division of Laser Science. Presentation FWW6, “Constructing Human Retinal Capillary Maps from Adaptive Optics SLO Imaging,” will be presented on Oct. 22.


Story Source:

The above story is based on materials provided by Optical Society of America. Note: Materials may be edited for content and length.


Cite This Page:

Optical Society of America. "New Technique For Mapping Blood Supply In Retina Increases Safety, Comfort Of Exams." ScienceDaily. ScienceDaily, 10 October 2008. <www.sciencedaily.com/releases/2008/10/081010115131.htm>.
Optical Society of America. (2008, October 10). New Technique For Mapping Blood Supply In Retina Increases Safety, Comfort Of Exams. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2008/10/081010115131.htm
Optical Society of America. "New Technique For Mapping Blood Supply In Retina Increases Safety, Comfort Of Exams." ScienceDaily. www.sciencedaily.com/releases/2008/10/081010115131.htm (accessed April 1, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Wednesday, April 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Liberia Sees Resurgence of Drug Trafficking as Ebola Wanes

Liberia Sees Resurgence of Drug Trafficking as Ebola Wanes

AFP (Apr. 1, 2015) The governments of Liberia and Sierra Leone have been busy fighting the menace created by the deadly Ebola virus, but illicit drug lords have taken advantage of the situation to advance the drug trade. Duration: 01:12 Video provided by AFP
Powered by NewsLook.com
Stigma Stalks India's Leprosy Sufferers as Disease Returns

Stigma Stalks India's Leprosy Sufferers as Disease Returns

AFP (Apr. 1, 2015) The Indian government declared victory over leprosy in 2005, but the disease is making a comeback in some parts of the country, with more than a hundred thousand lepers still living in colonies, shunned from society. Duration: 02:41 Video provided by AFP
Powered by NewsLook.com
7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Solitair Device Aims to Takes Guesswork out of Sun Safety

Solitair Device Aims to Takes Guesswork out of Sun Safety

Reuters - Innovations Video Online (Mar. 31, 2015) The Solitair device aims to take the confusion out of how much sunlight we should expose our skin to. Small enough to be worn as a tie or hair clip, it monitors the user&apos;s sun exposure by taking into account their skin pigment, location and schedule. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins