prism glasses


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prism glasses

An optical device, used by persons who must lie supine for extended periods, to allow them to view objects in their environment without eye or neck strain. Prisms mounted on spectacle frames bend the image to make the feet visible while the person is looking straight ahead.
See also: glasses
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References in periodicals archive ?
Bultitude and Rafal (2010) provided a single case report of a patient with early CRPS managed with prism glasses and mirrors.
Giorgi RG, Woods RL and Peli E (2009) Clinical and laboratory evaluation of peripheral prism glasses for hemianopia.
Before Peli's invention, others had tried to develop prism glasses to bring the missing part of the patient's visual field into view.