US PATENT SUBCLASS 351 / 210
.~.~.~ Using photodetector

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}
205  DF  .~ Objective type {10}
209  DF  .~.~ Including eye movement detection {1}
210.~.~.~ Using photodetector

DEFINITION

Classification: 351/210

Using photodetector:

(under subclass 209) Subject matter where the indicating or recording means is a photosensitive device.