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Univ.-Prof. Dr.-Ing. Sascha Klee
Head of Optoelectrophysiological medical technology Group
Univ.-Prof. Dr.-Ing. Sascha Klee
+49 3677 69 1323
The examination of the visual field – the perimetry – is one of the most important methods for early diagnosis of glaucoma and other eye disorders. Conventional treatments require an active cooperation of the patient. This refers to the ability as well as to the will to fix a defined point in the visual field and to signalise the perception of a light stimulus.
If these preconditions are not fulfilled than a visual field testing can only carried out with patient independent methods. It is known, that stimulus perception can be clinical detected by the means of the EEG. The signal parts in the EEG that are cause by stimulation of the visual system are named visual evoked potentials. At previous examinations it was necessary that the patient fixes on one point during the complete testing. This is very exhausting. For this reason the stimuli is supposed to track the current line of vision. Newly developed pseudo-random sequences are used as stimuli. The stimulation occurs multifocal, i.e. at various retinal places simultaneous, to reduce the examination time to a reasonable extend.