Noninvasive Glaucoma Test Might Speed Up
WEDNESDAY, Dec. 1 (HealthDay News) -- A test that measures the
function of nerve cells in the retina may detect glaucoma at an
early stage and help doctors evaluate the effectiveness of
treatments, a new study has found.
Diagnosing glaucoma as early as possible -- before it destroys
the optic nerve -- is key to preventing vision loss, according to
the researchers, from the Bascom Palmer Eye Institute at the
University of Miami Miller School of Medicine.
The test, known as a pattern electroretinogram optimized for
glaucoma screening, measures the electrical activity of the retina
as a person looks at an alternating pattern of black and white
The test can detect dysfunction and abnormal changes in retinal
ganglion cells (RGCs) that appear early in the glaucoma process,
the researchers said, making it potentially valuable as a
non-invasive method of detection.
Studying 47 people with glaucoma who had surgery because their
intraocular pressure could not be controlled by medications, the
researchers said the test was able to show reversal of RGC
dysfunction and reduced intraocular pressure after the
However, larger studies are needed to confirm the results, study
co-leader Mitra Sehi said in a news release from the American
Academy of Ophthalmology.
The U.S. National Eye Institute has more about
SOURCE: American Academy of
Ophthalmology, news release, Dec. 1, 2010
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