US PATENT SUBCLASS 351 / 200
EYE EXAMINING OR TESTING INSTRUMENT

Current as of: June, 1999
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351 /   HD   OPTICS: EYE EXAMINING, VISION TESTING AND CORRECTING

200EYE EXAMINING OR TESTING INSTRUMENT {7}
201  DF  .~> For fusion and space perception testing (e.g., stereoscopic vision) {1}
203  DF  .~> Eye exercising or training type
204  DF  .~> For interpupillary distance measuring or lens positioning
205  DF  .~> Objective type {10}
222  DF  .~> Subjective type {7}
245  DF  .~> Support
246  DF  .~> Methods of use {1}

DEFINITION

Classification: 351/200

EYE EXAMINING OR TESTING INSTRUMENT:

(under the class definition) Subject matter including ophthalmic instruments, optical systems and methods for testing vision, for optical examination and diagnosis (and treatment) with respect to disease and irregularities of the eye, and for ascertaining lenses for correcting errors of refraction or other defects of the eye.

(1) Note. The instruments may comprise supporting bases corneal microscopes, slit lamps and other eye illuminating means, adjustable head or chin resting devices, and illuminable targets. The instruments here are concerned with for example the measuring and testing of the vision characteristics of the eye for the purpose of correcting any determined visual defects. These instruments are associated with the visual path of the eye either for viewing the interior of the eye through the visual path or by utilizing the visual path during the measurement or test. Instruments especially for examining or diagnosing the eye which do not involve its visual path are classified here, if they are essentially optical. However, instruments for treating the eye, or for examining the eye when not optical and not associated with the visual path are classifiable elsewhere. For example, Class 600, Surgery, subclasses 398+ for Tonometry, Class 351, subclasses 41+ for spectacles and eyeglasses and Class 601, Surgery: Kinesitherapy subclass 37 for eye exercising devices. Multipurpose instruments which measure or test within the scope of this subclass, but also perform some nonoptical eye test not associated with the visual path or perform some treatment of the eye are classifiable here, especially in the indented subclass 203.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41+, for spectacles and eyeglasses.

205+, for objective eye testing (e.g., ophthalmoscope and retinoscopes).

211+, for projected target image.

222+, for subjective eye testing. SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

368+, for microscopes, generally.

600, Surgery,

300+, for diagnostic instruments generally.

606, Surgery,

204.25, for eye exercising devices which make physical contact with the eye. See also (1) Note above.