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SPECTACLES FOR THOSE FORCED TO BE RECUMBENT
Many physicians have on occasion felt the desirability of supplying persons compelled to be in a completely supine position with some type of spectacle that would enable them to read while lying absolutely flat on the back. Reading in this posture without special aid requires holding the book or periodical in a tiring position above the face or else holding the eyes in a position which is in itself tiring. In the British Medical Journal for Aug. 10, 1935, appears the description of a pair of spectacles made with especially designed prisms which allow the wearer's eyes to be held in a normal position while the book is held in a comfortable position resting on the chest or abdomen. The prisms are designed so that light is reflected twice and emerges at the third surface free from distortion or color of the
Miscellany. JAMA. 1936;106(1):71. doi:10.1001/jama.1936.02770010073040