BE070124

21 Jul 1948, Southbridge, Massachusetts, USA --- 7/21/1948-Southbridge, MA-: This remarkable instrument has been dubbed the Phorometer and is being used by opthamologists and optometrists to test eyes for visual deficiencies. It can determine the proper prescription for corrective glasses, discover impairments in the abilty of the two eyes to function as a single unit, and correct squints or cross-eyes. --- Image by © Bettmann/CORBIS

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