Health

Device offers partial vision for the blind

The Food and Drug Administration on Thursday approved the first treatment to give limited vision to people who are blind, involving a technology called the artificial retina.
The device allows people with a certain type of blindness to detect crosswalks on the street, the presence of people or cars, and sometimes even large numbers or letters. The approval of the system marks a milestone in a new frontier in vision research, a field in which scientists are making strides with gene therapy, optogenetics, stem cells and other strategies.

“This is just the beginning,” said Grace Shen, a director of the retinal diseases program at the National Eye Institute, which helped finance the artificial retina research and is supporting many other blindness therapy projects. “We have a lot of exciting things sitting in the wings.”

The artificial retina is a sheet of electrodes implanted in the eye. The patient is also given glasses with an attached camera and a portable video processor. This system, called Argus II, allows visual signals to bypass the damaged portion of the retina and be transmitted to the brain.

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