US PATENT SUBCLASS 351 / 227
.~.~ Including trial frame

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.~.~ Including trial frame {4}
228  DF  .~.~.~> With multifocal lens
229  DF  .~.~.~> With plural lens carrier
230  DF  .~.~.~> With individual lens holder
231  DF  .~.~.~> Removably attachable to eye glass frame

DEFINITION

Classification: 351/227

Including trial frames:

(under subclass 222) Subject matter including frame structure for removably, adjustably and selectively supporting test lenses before the patient's eyes during examination, the structure being adjustable to the features of the patient's head.

(1) Note. The adjustment to the patient's features may include lateral and vertical adjustment, angular adjustment between the temples and the center part of the frame, and interpupilar distance. The test-lens support may include a ring type holder which may be rotated and may be provided with a graduated scale to ascertain the axial line and position of a cylindrical or prismatic lens.

SEE OR SEARCH THIS CLASS, SUBCLASS:

216, including movable lens.