US PATENT SUBCLASS 351 / 175
.~.~ Prismatic type

Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

41  DF  SPECTACLES AND EYEGLASSES {29}
159  DF  .~ Ophtahalmic lenses or blanks {10}
175.~.~ Prismatic type

DEFINITION

Classification: 351/175

(under subclass 159) Subject matter wherein the lens is formed with a wedge or tapered cross section to deflect, for example, the light path from the object to the eye, or to correct strabismus or eye deviation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

170, for multifocal lenses with prismatic segments.

203, for eye exercising and training devices.