US PATENT SUBCLASS 351 / 240
.~.~.~ Stereoscopic type

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}
239  DF  .~.~ Including test chart or target {5}
240.~.~.~ Stereoscopic type

DEFINITION

Classification: 351/240

Stereoscopic type:

(under subclass 239) Subject matter comprising stereoscopic or depth perception target-charts, such as used for testing muscle-imbalance and or depth perception of the eye.