Brain implant restores partial vision to blind people
Brain implant
restores partial vision to blind people
Medical experts hail ‘paradigm shift’ of implant that
transmits video images directly to the visual cortex, bypassing the eye and
optic nerve
Sat 13 Jul 2019 07.51 BST Last modified on Sat 13 Jul
2019 07.57 BST
Partial sight has been restored to six blind people via
an implant that transmits video images directly to the brain.
Some vision was made possible – with the participants’
eyes bypassed – by a video camera attached to glasses which sent footage to
electrodes implanted in the visual cortex of the brain.
University College London lecturer and Optegra Eye
Hospital surgeon Alex Shortt said it was a significant development by
specialists from Baylor Medical College in Texas and the University of
California Los Angeles.
“Previously all attempts to create a bionic eye focused
on implanting into the eye itself. It required you to have a working eye, a
working optic nerve,” Shortt told the Daily Mail.
“By bypassing the eye completely you open the potential
up to many, many more people.
“This is a complete paradigm shift for treating people
with complete blindness. It is a real message of hope.”
The technology has not been proven on those born blind.
The US team behind the study asked participants, each of
whom has been completely blind for years, to look at a blacked-out computer
screen and identify a white square appearing randomly at different locations on
the monitor.
The majority of the time, they can find the square.
Paul Phillip, who has been blind for almost a decade,
says that when he wears the glasses to go on his evening walks with his wife,
he can tell where the pavement and grass meet.
He also can tell where his white sofa is located.
“It really is amazing to be able to see something even if
it is just points of light for now,” Phillip said.
Study leader and neurosurgeon Daniel Yoshor said his team
was “still a long way from what we hope to achieve”.
“This is an exciting time in neuroscience and
neurotechnology, and I feel that within my lifetime we can restore functional
sight to the blind,” Dr Yoshor said.
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