Science: Vision Probe

All sorts of gadgets have been developed to help the blind to "see" by sound or touch, but none has come into widespread use. They are generally too complicated, heavy, expensive or conspicuous. Dunn Engineering Associates, Inc. of Cambridge, Mass, is demonstrating a small, simple, inconspicuous device that may have more practical appeal. Its designer, the late Dr. Clifford Martin Witcher of M.I.T., was blind himself.

Physicist Witcher lost his sight when he was five years old, but blindness did not slow him down appreciably. He graduated from Georgia Tech, won a Ph.D. at Columbia. For sight he substituted an amazing ability...

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