Device and method for measuring and displaying bioelectrical function of the eyes and brain
OwnerRonald Siwoffinventor
Life of this patent
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Abstract
Apparatus, system, and computer-readable media measure electroencephalography (EEG) signals or ERG signals generated from a device that presents a series of images on a timing cycle to a subject. The apparatus comprises a Central Processing Unit (CPU), Power Supply Unit (PSU), Random Access Memory (RAM), and a hard drive (HDD). The apparatus further includes at least one electrode and a photo-sensor like a photodiode for conversion of light into electric current. The CPU is operable with software for converting the EEG or ERG signals evoked from the visual stimuli to provide data and retrieving the status of EEG signals.
Claims27
A system for measuring electrical activity of a nervous system evoked from visual stimuli presented to an eye of a subject comprising:
- a. an electronic visual display device, for displaying visual stimuli to the subject;
- b. a photosensor for sensing display of the visual stimuli to the subject by the electronic visual display device;
- c. at least one electrode for receiving electrical signals resulting from the subject in response to the visual stimuli;
- d. an analogue to digital converter that converts the electrical signals received from the subject to digital data;
- e. a digital data storage medium for recording the digital data;
- f. a central processing of a computer unit (CPU) with programming to cause the electronic visual display device to display the visual stimuli as a series of at least two images on a timing sequence;
- and
- g. a synchronizer, which synchronizes each of at least two consecutive images of the visual stimuli from the electronic visual display device with the electrical signal received by the at least one electrode, said synchronizer synchronizing the electrical signals resulting from the subject in response to the visual stimuli with data from the photosensor corresponding to a beginning of a timing cycle for display of said at least two consecutive images;
- wherein the system further comprises programming to cause the CPU to calculate signal averaged digital waveforms based on an average of the electrical signals received from the at least two consecutive images of the visual stimuli.
A method for measuring electrical activity of a nervous system evoked from visual stimuli displayed to an eye of a subject, comprising the steps of:
- a. visually displaying visual stimuli to the subject as a series of at least two images with a visual display device according to a timing sequence;
- b. detecting electrical signals from the subject evoked in response to the visual stimuli;
- c. detecting the initial time when each of at least two consecutive images of the visual stimuli is displayed by the video display device, wherein timing for display of the at least two consecutive images is determined by sensing display of light from the visual display device using a photosensor;
- d. synchronizing, with a synchronizer, the electrical signals resulting from the subject in response to the visual stimuli with data from the photosensor corresponding to the initial time and timing each of said at least two consecutive images is displayed to the subject;
- e. converting the electrical signals to digital data for the at least two consecutive images;
- and
- f. signal averaging the digital data from said at least two consecutive images to provide a signal averaged data for the visual stimuli as a function of time.
A non-transitory computer storage readable medium for a vision examination system, comprising computer-useable instructions that, when used by one or more computing devices, cause the one or more computing devices to:
- a. instruct a visual display device to display visual stimuli to a subject as a series of at least two images according to a timing sequence;
- b. receive electrical signals from a subject to whom said visual stimuli is displayed that evoked as a result of visual exposure to the visual stimuli;
- c. receive data from a photosensor for detecting an initial time when each of at least two consecutive images of the visual stimuli is displayed by the video display device;
- d. synchronize the electrical signals evoked as a result of visual exposure to the visual stimuli with the initial time each of said at least two consecutive images is displayed to the subject;
- e. convert the electrical signals to digital data for said at least two consecutive images;
- and
- f. signal average the digital data from said at least two consecutive images to provide a signal averaged data for the visual stimuli as a function of time.
A system for measuring electrical activity of a nervous system evoked from visual stimuli presented to an eye of a subject, comprising:
- a. an electronic visual display device, for displaying visual stimuli to the subject;
- b. at least one electrode for receiving electrical signals resulting from the subject in response to the visual stimuli;
- c. an analog to digital converter that converts the electrical signals received from the subject to digital data;
- d. a digital data storage medium for recording the digital data;
- e. a central processing unit (CPU) of a computer with programming to cause the electronic visual display device to display the visual stimuli as a series of at least two images on a timing sequence;
- f. a photosensor for sensing for sensing light emitted by the electronic visual display device;
- and
- g. a synchronizer, which synchronizes each of the at least two images of the visual stimuli from the photosensor corresponding to a beginning of a timing cycle for display of said at least two images;
- wherein the system further comprises programming to cause the CPU to calculate signal averaged digital waveforms based on an average of the electrical signals received from said at least two images of the visual stimuli.
Dependencies are inferred from the claim text.