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New device finds early signs of eye disease in preemies
Date:9/21/2009

DURHAM, N.C. -- Tell-tale signs of a condition that can blind premature babies are being seen for the first time using a new handheld device in a study at Duke University Medical Center.

The technology, developed in part by Duke biomedical engineers, uses spectral domain optical coherence tomography (SD OCT) to create a 3-D picture of the back of the eye. "This new tool is changing the way we identify eye conditions in infants," says Cynthia Toth, MD, an ophthalmologist at the Duke Eye Center, who is leading the study that appears online this month in the journal Ophthalmology.

Retinopathy of prematurity (ROP) is one of the most common causes of vision loss in children, affecting about 16,000 babies each year, according to the National Eye Institute. It occurs when babies are born prematurely and their retinal blood vessels don't develop fully. Instead, the vessels grow abnormally and are prone to leaking and contracting. That can pull the retina out of position, causing retinal detachments that can lead to visual loss and blindness.

Current screening for ROP is based on two-dimensional images taken either with an ophthalmoscope or a camera placed directly on the infant's cornea. "Examining the retina with these methods is like looking at the surface of the ocean and only seeing dimly into the shallow water," says Toth, a professor of ophthalmology and biomedical engineering. "You cannot see what lies below."

SD OCT, on the other hand, uses a narrow beam of light to create a 3-D high-resolution map of the intricate detail in the retina's layers. "This is like looking into an aquarium from the side, where all the fish at every depth are visible," Toth says.

Ophthalmologists at Duke Eye Center pioneered and have been using OCT to accurately diagnose adult eyes for more than a decade, and in the past two years, Toth has been studying the application of this technology for retinal diseases in children.


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Contact: Debbe Geiger
Debbe.Geiger@duke.edu
919-660-9461
Duke University Medical Center
Source:Eurekalert

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