DENIED the use of both arms and legs, the quadriplegic is usually condemned to inertia. But his sentence to stasis may soon be lifted by a switch that enables him to control a motorized wheelchair by eye movements alone. Manufactured by Hayes International Corp., and originally intended for use by astronauts, the Sight Switch uses eyeglass-mounted sensors to measure the intensity of light reflected from the whites of the operator's eyes. The sensors then transmit their readings to a computerized box on the wheelchair.
Adjusted to the eye color of the wearer and programmed...
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