System for study and calculation of visual field

Abstract From the Canadian patent

The present invention relates to a system for the study and calculation of the visual field, which has basic novelty features as well as considerable advantages over existing means used for this same purpose. The basic idea consists in the use of a wide surface cathode ray tube (CRT) as a campometric screen so as to generate background and luminous stimuli capable of provoking a positive response of the subject explored. An original system of generation and amplification of the video signal also allows presenting, simultaneously, a background of variable luminosity which fills up the surface of the screen luminous test, stimuli with variable luminosity and location as well as the, points …