• BREAKING NEWS ABC shows live and on-demand -- Download the WATCH ABC app!

New therapy might help with vision loss

August 17, 2009 12:00:00 AM PDT
A new therapy is helping teach patients with macular degeneratiA new therapy is helping teach patients with macular degeneration how to see.on a whole new way of seeing. Four years ago macular degeneration made Russell Delong's world go black.

"To start with, I was totally blind. I couldn't see nothing," said Delong.

He had surgery, but his vision was still blurry.

"Everything looked like a real heavy foggy, real heavy. I couldn't see that tractor at all, I could just tell there's something there," said Delong.

After years of treatment, he thought he was out of options.

A recent study found the brain reorganizes itself to compensate for vision loss. That's the key to a new therapy that teaches patients a whole new way of seeing.

A computer maps areas of the retina damaged by macular degeneration, and those that are intact. Then it trains the patient to shift his vision, using the good retinal cells to see.

"So it's really a series of biofeedback training to get the patient to move in that positive way that we feel is going to be the most sensitive and give him or her the best vision," said Susan Primo, O.D., M.P.H., Director of Low Vision Services at the Emory Eye Center.

Now with special glasses, Russell can read a magazine. Back on the farm, he can see things that used to be a blur.

"If I look at it and it's blank. If I turn my head a little and I see around the scar tissue there's a tractor. I can do everything out here, everything," said Delong.

At 74, Russell still has busy days ahead and wants to see every second.

"I'm going to keep going," said Delong.

Researchers are currently testing the computer therapy at Emory University. Smoking, obesity and race play a role in your risk of developing macular degeneration.

Web Extra Information: Learning To See With AMD

BACKGROUND:

About 13 million Americans show signs of age-related macular degeneration (AMD), a condition that destroys central vision so things like reading, watching TV and driving are impossible. The condition also robs a person of the ability to see colors and fine detail. Because the U.S. population is expected to age rapidly, cases of AMD are only expected to increase. Middle-aged people have about a 2 percent risk of developing AMD, but this risk increases to almost 30 percent in those over 75.

There are two types of AMD: wet and dry. Wet AMD occurs abnormal blood vessels behind the retina start to grow under the macula, the central part of the retina. Those blood vessels then leak blood and fluid that cause the macula to bulge outward. Symptoms of wet AMD often develop quickly and include seeing straight lines as wavy. Dry AMD happens when light-sensitive cells in the macula break down and blur central vision. The most common symptom of dry AMD is slightly blurred vision. The condition develops slowly.

TREATMENT:

According the American Health Assistance Foundation, currently there is no treatment or cure for dry macular degeneration. However, taking a specific high-dose formula of vitamins and mineral supplements called the AREDS formula has been shown to significantly reduce the risk of progressing from intermediate to advanced or wet macular degeneration. Treatments for wet macular degeneration include drugs called angiogenesis inhibitors (Lucentis, Macugen); photocoagulation, which involves using a high-energy laser to destroy leaking blood vessels; and photodynamic therapy.

RELEARNING TO SEE:

Doctors at Emory Eye Center in Atlanta, Ga., are working on a unique form of treatment for AMD that takes advantage of the brain's ability to reorganize itself to make up for vision loss. The therapy involves training AMD patients to focus on using the good cells that remain. "We are encouraging them or influencing them to be able to use those parts of the retina to be able to better utilize the residual vision," says Susan Primo, O.D., M.P.H., Director of Low Vision Services at the Emory Eye Center.

In the treatment, doctors first use a computer to map out the areas of the eye that are damaged. The machine then locates the areas that are still sensitive based on factors like thickness of the retina.

The computer then uses biofeedback -- in this case a series of beeps that gets faster and louder as the patient moves closer to using the healthiest portion of the eye -- to train the patient to move their eye into the position that gives them the best possible vision.

Report Typo |  Send Tip |  Get Alerts | Most Popular
Follow @abc7 on Twitter  |  Become a fan on Facebook


Load Comments