There is disclosed a system for improving the visual field of a handicapped person which utilizes a wide angle lens which is placed in front of an object such as a screen of a television set to be viewed. This operates in conjunction with a prism to provide a reduced image of a size which is compatible...http://www.google.fr/patents/US4802756?utm_source=gb-gplus-shareBrevet US4802756 - Low vision apparatus and device and method for enabling the visually handicapped to view television
Low vision apparatus and device and method for enabling the visually ...
