Daisuke Wakabayashi/The Wall Street Journal
A mirror from Panasonic displays digital information such as a patient's movement to help Takao Yamamura, 77, rehabilitate after suffering nerve damage.
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A wave of new mirrors are relying not on hocus-pocus but on sensors, cameras, and flat-panel displays to transform the time-tested looking glass. Daisuke Wakabayashi reports on digits. Photo: MIT.
