.~ Asymmetric (e.g., prismatic or eccentric, etc.)
DEFINITION
Classification: 359/720
Asymmetric (e.g., prismatic or eccentric, etc.):
(under subclass 642) Subject matter wherein the center of mass of the lens is laterally spaced from the optical axis of the lens.
(1) Note. This subclass provides for both prismatic lenses which have at least one component formed with a wedge prism or the equivalent thereof between its opposed refracting surfaces, and eccentric lenses in which at least one component is formed as a segment of a symmetrical lens.
(2) Note. A substantial portion of the lenses under this definition are for mounting on automobile windshields to facilitate viewing of traffic lights by the operator of the automobile.
