Abstract: Patients suffering severe retinal damage and focusing impairment are examined in an area having actual or simulated outdoor illumination by viewing a large graphic having colored familiar objects, number and letters of graduated incremental sizes thereon with colored backgrounds either darker or lighter than the objects, numbers and letters involved which the patient points out to ascertain the patient's estimated optimal correction for distance vision. Based on said estimate, the patient is provided with a combination of a soft contact lens either between the estimated correction and a correction obtained by traditional testing methods using black letters against a white background in a darkened room, or the best correction obtained by the examination with the large graphic and a plurality of spectacle type lenses in incremental diopter corrections of two or three diopters for training purposes.

Abstract: Patients suffering severe retinal damage and focusing impairment are tested in an area having actual or simulated outdoor illumination by viewing a graphic having colored familiar objects and letters of graduated incremental sizes thereon with colored backgrounds either darker or lighter than the objects and letters involved to ascertain the patient's estimated optimal correction for distance vision. Based on said estimate, the patient is provided with a combination of a soft contact lens between the estimated correction and a correction obtained by traditional testing methods using black letters against a white background in a darkened room, and a plurality of spectacle type lenses in incremental diopter corrections of two or three diopters for training purposes.

Abstract: Sheet feeder having adaptive mechanism for assuring dependable automatic operation when the stack of sheets to be fed consists of sheets having varying thicknesses and weights. In a sheet feeder having pickers to move a document from the top of a stack of sheets supported by a moveable table to a feed-in position, the latter possibly including a vacuum belt for moving the document, sensors supply signals to indicate a sheet has been picked. After moving the pickers and table to initial positions, the controller moves the picker to a predetermined reference position. If a sheet is picked above or below the predetermined initial position, the position of the table is adjusted accordingly.