US PATENT SUBCLASS 351 / 161
.~.~.~ Multifocal

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}
160 R  DF  .~.~ Eye contact type {3}
161.~.~.~ Multifocal

DEFINITION

Classification: 351/161

(under subclass 160) Subject matter wherein the contact lens comprises two zones of different focal length, one zone to correct the distance vision and another zone to correct the reading vision.

SEE OR SEARCH THIS CLASS, SUBCLASS:

168, for multifocal lenses generally.