US PATENT SUBCLASS 351 / 236
.~.~.~ Movable along optical axis

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

200  DF  EYE EXAMINING OR TESTING INSTRUMENT {7}
222  DF  .~ Subjective type {7}
233  DF  .~.~ Lens or filter selectively insertable in optical path {2}
236.~.~.~ Movable along optical axis

DEFINITION

Classification: 351/236

Movable along optical axis:

(under subclass 233) Subject matter wherein individual trial lenses or optical systems comprising plural superimposed adjustable lenses are movable along the optical axis before the eyes of a patient in a plane vertical to the direction of sight.

(1) Note. The above lenses or optical systems may be in monocular or binocular test instruments, and may comprise sets of reflecting prisms intersecting the line of sight.