(under subclass 222) Subject matter wherein a still projector casts one or more illuminated chart or target images on a screen for use in vision testing.
(1) Note. Included here are two-dimensional and/or stereoscopic reading-training projectors which are successively fed sequential frames of intelligence on strips or circular discs.
SEE OR SEARCH THIS CLASS, SUBCLASS:
211, for projected targets involved in objective eye testing.
243, for illuminated test charts or targets generally.
