Spectacles

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.... or extra lenses, to be used as occasion requires. decentered s., spectacles with lenses formed from ecentric portions of two convex lenses. divided s., bifocal glasses. industrial s., protective s. Masselon's spectacles with an attachment for keeping the upper lid raised in cases of paralytic ptosis. mica s., spectacles sheet mica used to protect the eye from foreign bodies pantoscopic s., bi....

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....ind of spectacles of wire gauze worn to protect the eye from the entrance of foreign bodies." In the Oxford English Dictionary on Historical Principles, spectacle has been defined as :- "A means of seeing; something made protecting the eyes from dust, light, etc., consisting of two glass lenses set in a frame which is supported on the nose, and freq. kept in place by 'legs' passing over....