US 7,740,592 B2Granted

Method and apparatus for objective electrophysiological assessment of visual function

AssigneeThe University of Sydney

InventorsStuart L. Graham, Iouri Malov, Alex Kozlovski, Alexander Klistorner

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Abstract

For electrophysiological assessment of visual function, a head mounted stereo display (eg virtual reality goggles) for displaying a stimulus is used to generate a retinal or cortical response. In particular, a method for objective electrophysiological assessment of visual function of at least one eye of a subject includes presenting a visual stimulus to at least one eye of the subject, recording at least one of a retinal response and a cortical response generated as a result of the presenting, analyzing said response and, as a result of said analysing, forming a map of the visual function of the at least one eye of the subject. The invention also relates to a system for such electrophysiological assessment.

Claims28

Dependent claims

A system of simultaneous electrophysiological assessment of visual function of two eyes of a head, the head having a scalp, each eye having a visual field, the system comprising:

a device configured to simultaneously stimulate different portions of the visual field of each eye with a visual stimulus comprising sequences of different timing or character, wherein the device is configured to binocularly present different pseudorandom visual stimulus patterns to each of the two eyes simultaneously, each said different pattern for each eye comprising different stimulus sequences in each said portion of the visual field of each eye;
electrodes adapted to be placed on the scalp and configured to simultaneously obtain:
overall spontaneous brain activity levels comprising electroencephalogram levels during said stimulating;
and
visual evoked potential (VEP) signals representative of retinal responses of each of the two eyes to the visual stimulus in each of the stimulated portions of the visual field of each respective eye, wherein a signal representative of each of the stimulated portions of the visual field of each eye are obtained simultaneously;
and
software for electrophysiological assessment of the visual function of each of the two eyes based on the respective VEP responses of each of the two eyes to the different pseudorandom stimulus visual patterns visual stimulus.

4 more elements

Dependencies are inferred from the claim text.