US PATENT SUBCLASS 351 / 228
.~.~.~ With multifocal lens

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

200  DF  EYE EXAMINING OR TESTING INSTRUMENT {7}
222  DF  .~ Subjective type {7}
227  DF  .~.~ Including trial frame {4}
228.~.~.~ With multifocal lens

DEFINITION

Classification: 351/228

With multifocal lens:

(under subclass 227) Subject matter including structure for selecting near and far vision portions of multifocal lenses, demonstrating optical characteristics of multifocal lens segments, and for properly locating the segments relative to the basic lens and the eyes of the patient.