PURPOSE: To measure the potential or magnetic field excited by light with only a slight distraction by using a visual sense stimulating signal generator for imparting a stimulating signal to the eye of a patient. CONSTITUTION: A measuring device 10, for example, SQUID magnetometer is movable relatively to a holder 30 by one moving device. This is shown by straight line and curved arrow 34, 36. The potential or magnetic field excited by light in a head 2 can be measured in no contact. A stimulation signal generator 12 is arranged in a position relatively far from a patient and the measuring device 10, and other diagnostic and treatment devices as occasion demands through lens systems 16, 26 and an optical waveguide 20, and on the outside of a shielding chamber 4, whereby the visual sense stimulation signal in the brain of the patient can be measured without distraction.
SIGHT STIMULATING APPARATUS