EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method

Abstract

The invention discloses an EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method. The system comprises a control unit, a retinal stimulator unit, an ERG signal acquisition unit and an ERG signal processing unit. The method comprises the following steps: adjusting illumination and flash rate of a stimulation light source; arranging three skin electrodes on the forehead just above eyes of a subject, on the inner sides of the eyes and the bridge of a nose and at eyelids respectively; performing dark adaptation for more than 20 minutes; aligning the eyes of the subject to the stimulation light source; acquiring an EOG signal; performing light stimulation on the eyes of the subject, synchronously acquiring the ERG signals on the inner sides of the eyes and the bridge of the nose and at the eyelids of the subject respectively, and storing after signal conditioning and AD (Analog-Digital) conversion; reading the ERG signals by an ERG signal processing and analysis unit and processing and analyzing the ERG signal. The ERG signals are acquired by using the external skin electrodes, so that the acquisition is more convenient and safer, and the cost is lower; for signal processing, the adopted method is small in operation and high in feasibility and can realize rapid signal processing.

Description

technical field [0001] The invention relates to the technical field of visual signal acquisition and processing, in particular to an EOG-based ERG signal acquisition and processing system and method. Background technique [0002] The visual system is one of the most important sensory systems of human beings, and diseases of the visual system seriously threaten our normal life. Many lesions of the visual system are gradual, and early detection and treatment are important topics in clinical ophthalmology, preventive medicine, and epidemiology. Compared with traditional psychophysical examination, visual electrophysiological examination can realize a comprehensive diagnosis of visual pathway from the perspective of electrophysiology, and provides a more suitable means for the detection of early visual lesions. Traditional visual electrophysiology includes three aspects: electroretinography (Electroretinography, ERG), visual evoked potential (Visual Evoked Potential, VEP), elec...

AI Technical Summary

Problems solved by technology

[0007] The traditional ERG measurement uses contact lens electrodes, which need to be placed on the surface of the cornea. Due to the special position of the detection electrodes, the patient's blinking and eye movements during the detection process will cause serious eye discomfort. Wearing it correctly is likely to cause some damage to the subject's cornea

At the same time, it is not suitable for children and other patients who are not easy to cooperate and patients with corneal diseases to collect ERG signals through corneal contact lenses, and in order to avoid bacterial infection, contact lens electrodes are not suitable for repeated use, which increases the detection cost

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