title: Evaluation of a CCTV device for partial sight.
abstract: Closed circuit TV has proved to be a valuable aid for many patients with partial sight and a new device for magnification of printed material has been developed. This is in the form of a small camera, guided over the page by the subject's hand and incorporating a roller drive for a scanning mechanism. The scanning head fits into the hand easily; it is linked to an electronic TV receiver in the form of a mosaic. Tracking the scanner manually operates a flow of the display to the left, with new material emerging from the right of the screen. The present paper outlines an evaluation of the device under different conditions with patients.
mesh_terms: D000293:Adolescent; D000328:Adult; D005069:Evaluation Studies as Topic; D006801:Humans; D011932:Reading; D013690:Television / Q000379:methods*; D014786:Vision Disorders / Q000628:therapy*