US PATENT SUBCLASS 351 / 223
.~.~ Self examining 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}
223.~.~ Self examining type

DEFINITION

Classification: 351/223

Self examining type:

(under subclass 222) Subject matter includes eye testing devices which may be operated by a person testing his own eyes.

(1) Note. The device is usually inside a cabinet holding a plurality of pairs of eyeglasses for displaying, selecting and/or vending such glasses. Eyeglasses of varying strength are brought successively into the line of vision of the person desiring glasses until the spectacles best fitting the person's eyes are determined.