Abstract: A method and device for optically stimulating the visual system during static perimetry and for objectively evaluating adequate stimulus-related electrophysiological and/or magnetophysiological quantities. Light stimuli with defined parameters derived from a predetermined correlation function and from the known intensity dependence of the excitation response amplitude are presented to the observer. The excitation responses contained in the ERG and/or in the EEG/MEG are detected and processed. These excitation responses are used to determine and topographically evaluate the local sensitivity of the visual system. In one embodiment, the light sources are fixed inside a perimeter, and the excitation responses are amplified and digitized by a device, which preferably comprises an ERG/EEG measuring system and an A/D converter.

Abstract: The invention relates to the multi-channel recording of signals of various biological origins in the frequency range of 0 to several kilohertz, preparation of the reference potential for the differential amplifier on each channel, from the determined data from the analogue to digital converter and predominantly, though not exclusively, all areas of medicine in which biosignals are used.