(under subclass 200) Subject matter including the methods of operating or utilizing the instruments as defined in this subclass for the purpose of examining or testing the eyes.
(1) Note. The subclass does not provide for methods of making lenses except where fitting is involved as indicated in the indented subclass. Methods of making spectacles or lenses therefor are classified in subclass 177 unless provided for elsewhere as indicated in the search notes appended thereto. In general the original patents classified here have only method claims. If claims are included to both the testing instrument structure and the method of operating the instrument, the classification is with the instrument in the subclasses above, with a cross reference to these method subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
203, for combined eye testing and exercising instruments.
223, for eye testing devices operated by the person himself while selecting eyeglasses.
