One of a series on the visual information transfer problems of the partially sighted, the report contains a detailed description of the double X-Y platform, a mechanical device used in conjunction with a closed circuit television system to permit users to read printed or handwritten materials and to take notes on or copy from the material. Also…

To investigate whether screen color is an important variable in the prescription of closed circuit television (CCTV) systems, 16 adults with low vision were assessed on reading performance on white, green, and amber screens. When the screen luminance and contrast were equated for each CCTV, subjects' reading performance was unaffected by screen…

One of a series on the visual information transfer problems of the partially sighted, the report describes an interactive, multicamera, multimonitor closed circuit television (CCTV) system that permits continuous visual communication between teacher and students in an elementary school resource room. The system (in use since November 1973) is the…