|
Terry
Byland and Dr. Mark Humayun at a 2006 Council for Competitiveness
event. |
When Terry
Byland began having trouble seeing in the dim light of dark restaurants
and nightclubs, he wasn’t overly concerned. Soon after,
however, the problem began to affect his night driving. A year
later, he went to an ophthalmologist to have his eyes checked.
He wasn’t prepared for the grave diagnosis: Retinitis pigmentosa
(RP).
“What’s
going to happen to me?” Byland asked his doctor, who told
him that eventually he could go blind.
RP is a group
of relatively rare inherited eye diseases that attack the photoreceptor
cells in the retina, affecting about 1 in 4,000 people. Symptoms
begin with night blindness, generally progressing to tunnel vision
years or decades later and, finally, to complete blindness in
some affected individuals. Millions more become blind each year
from age-related macular degeneration (AMD), which strikes the
same photoreceptor cells but begins with loss of central vision.
There is no cure for RP and, as yet, no treatment.
|
Terry
Byland visits the World War II Memorial in Washington, DC. |
In Byland’s
case, the full progression took just 7 years, leaving him blind
when he was just 45. Forced to retire from a job he loved selling
tools and parts and no longer able to play the sports he enjoyed,
Byland struggled through bouts of depression, anger, and despair.
“My family saw me at my worst and didn’t know from
one day to the next what emotional state they’d find me
in,” Byland says.
Little by
little, he began to pick himself up, learning how to cope with
the new life he’d unwillingly been handed. “Blindness
robs you in so many ways, and either it deals with you or you
deal with it,” he explains. He started visiting the Braille
Institute, an advocacy organization for the blind, and soon realized
he wasn’t alone. Since then, Byland has built up an extensive
support network of other people with RP.
|
Terry
Byland visits the World War II Memorial in Washington, DC. |
Second
Chance
Nearly 11 years after blindness closed in, Byland learned about
the Department of Energy’s Artificial Retina Project through
a friend who’d had a cornea problem checked out at the nearby
Doheny Eye Institute of the University of Southern California
Medical Center. Passing a series of medical tests, Byland found
he was a suitable implant candidate. A few weeks later, he was
on the operating table—the last of six patients to receive
the first experimental device.
The decision
to go through the surgery wasn’t difficult, he says, even
though doctors at Doheny and Second Sight Medical Products Inc.,
the implant manufacturer, weren’t sure what he might be
able to see with the device. In the end, it came down to, “What
have I got to lose? If there’s a chance I can help myself
and others down the road, I’ve got to do this,” Byland
explains.
The 16-channel
implant that Byland received allows him to see images transmitted
from a tiny camera mounted on a pair of dark glasses. Seeing only
bits and pieces of light at first, Byland was guardedly optimistic
that eventually he’d make some sense of it all.
“Let’s
be honest, this isn’t a cure-all, but it could be; it just
needs good people to get it started,” he says.
Path
of Discovery
He never expected—nor did his doctors— that he’d
come as far as he has. When a person has been blind for some time,
a portion of the brain goes dormant and has to be retrained. During
3 years of extensive laboratory testing, the visual cortex of
Byland’s brain has relearned how to translate what it’s
seeing.
His doctors
conducted scores of tests to see whether the electrodes were working
right, adjusting to different levels of current. In the beginning,
Byland had trouble distinguishing whether the bars he was seeing
were horizontal or vertical and whether the light was in the upper
left or lower right corner.
After awhile,
though, being able to identify the light source became second
nature to him, and, every time he uses the device, his brain is
storing information again.
He can’t
make out shapes yet, but he can see the edges of light and dark
objects. When he walks down a street, for example, the edge of
a tree branch blocking his way will appear as a white line, alerting
him that something’s in his way. “Before, I would’ve
walked right into it,” Byland says. After dark, he can flip
on a switch and see light emanating from a chandelier on the ceiling
or make out changes in the light as action figures move across
a television screen.
“It
sounds pretty primitive to a sighted person,” Byland admits,
“but for a blind person like me, it’s really amazing
to see anything at all.” Especially exciting was being able
to see his 18-year-old son’s shadow as he passed by on a
sidewalk. “It was the first time I’d seen anything
of him since he was 5 years old,” Byland explains.
The retinal
implant has given him more confidence to go alone to unfamiliar
places. He can see light coming in through windows and tell where
a door is and whether it’s closed or open. He also enjoys
impressing the ladies when he can. “They think it’s
pretty cool when I can tell whether they’re wearing dark
or light clothing or if there’s a pattern on their blouse,”
which he determines from breaks in the light.
Future
Promise
Byland is hopeful that he’ll get a more advanced artificial
retina farther down the road. “It’s inspiring to know
that one day blind people won’t be stuck with darkness,”
Byland says. He’s also excited to have been part of developing
the implants and of letting people know that hope is on the way.
“It had to start somewhere, and we’re the roots of
that,” he adds.