Three-dimensional eye movement tracking system and tracking method thereof

Abstract

The invention discloses a three-dimensional eye movement tracking system, which comprises a pupil camera imaging module, an image recognition and analysis module, a motor control module and an OCT (Optical Coherence Tomography) system module which are connected in sequence. The tracking method of the system comprises the following steps that: continuous real-time imaging on an object to be detected is carried out through the pupil camera module at first; when the object to be detected, namely the eyes, moves along the eye axis or the transverse direction, namely the horizontal direction, or the longitudinal direction, namely the vertical direction, the sizes of the eye movements along the eye axis, the horizontal direction and the vertical direction can be respectively calculated through the image recognition and analysis module; then, the displacement amounts deltaZ, deltaX and deltaY of corresponding motors in the three directions are calculated; a corresponding motor is adjusted to move according to the calculated displacement of the motor, so that the object to be detected always keeps an accurate working distance and is aligned with the centre of an eyepiece; and three-dimensional imaging on an anterior segment or posterior segment of the eye of the object to be detected is carried out through the OCT system module. The invention can perform real-time tracking on three-dimensional eye movement and calculates the size and direction of the eye movement; the eye movement in diagnosis can be compensated in real time through the motor control module; high-quality system imaging is achieved; the complexity of a diagnosis system is reduced; and the diagnosis success rate and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of imaging devices, and in particular relates to a three-dimensional eye movement tracking system and a tracking method thereof. Background technique [0002] Optical coherence tomography (OCT) technology is a three-dimensional imaging technology, which has the advantages of high sensitivity, fast imaging speed and high resolution, and is widely used in ophthalmology (including anterior segment and posterior segment), cardiovascular department, dermatology, etc. field. In the past two decades, an important advancement of OCT technology is that the scanning rate is getting faster and faster, from traditional time-domain OCT to frequency-domain-based OCT (SD-OCT), and then to OCT based on swept-frequency source technology (SS-OCT). ), the speed of OCT imaging has been greatly developed. The fast imaging speed has unique clinical application advantages: two-dimensional and / or three-dimensional scanning can be...

AI Technical Summary

Problems solved by technology

However, these methods compensate the size of the eye movement to the driving waveform of the OCT scanning galvanometer, which are limited by the compensation range and frame rate, and cannot adjust the center alignment of the eye and the eyepiece in real time based on the eye movement, and do not target the eye axis. real-time eye tracking

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