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An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device.

Double Telescope Binocular

An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by…

optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Mounting Eyeglass

optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision

Early Design Spectacles

Optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision