VR HMD Gaze Tracking for Dynamic Strabismus and Heterophoria Training
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Solution Overview
Problem
Conventional strabismus and heterophoria treatments are cumbersome, require therapist intervention, and struggle to dynamically adjust to changing deviation angles, while devices are bulky and limit patient movement.
Innovation Solution
A VR-based system using a VR HMD and administrator terminal to provide visual training VR videos, shifting images to simulate prism effects, conduct convergence and divergence exercises, and expand the field of view, while monitoring user gaze to adjust image output based on strabismus and heterophoria degrees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional prism treatment is used to correct strabismus, then the deviation angle can be corrected, but the treatment process becomes cumbersome and requires therapist intervention for a long time
Solution Approach 1:
The patent replaces the mechanical prism system with a virtual reality-based optical system. Instead of using physical prisms that require manual adjustment by therapists, the invention uses VR head-mounted displays with digital image processing to achieve the same corrective effect through software-controlled image shifting and fusion, eliminating the need for mechanical manipulation during treatment
Solution Approach 2:
The patent creates a virtual copy of the visual training environment within the VR system. Rather than using physical prisms and real-world objects, the invention generates digital images that replicate and enhance the therapeutic effects, allowing for repeated, consistent training sessions without physical equipment manipulation
2Reliability
If conventional prism treatment is used, then strabismus can be corrected, but the patient's face must be kept in a fixed state without free movement
Solution Approach 1:
The patent transforms the static, fixed-position requirement of conventional prism treatment into a dynamic system. The VR head-mounted display automatically tracks and adjusts to the patient's head movements and eye positions in real-time, maintaining therapeutic effectiveness while allowing complete freedom of movement. The system adapts its image output dynamically based on the patient's changing orientation and gaze direction
Solution Approach 2:
The VR system serves multiple functions simultaneously: it provides strabismus correction, allows free patient movement, tracks eye position, and adjusts treatment parameters all within a single integrated platform. This multi-functional approach replaces the limited, single-purpose conventional prism method
3Reliability
If conventional treatment devices are used, then strabismus can be treated, but the devices are bulky and patients have limited movement during treatments
Solution Approach 1:
The patent replaces bulky mechanical prism devices with a lightweight VR head-mounted display. The digital image processing system eliminates the need for heavy optical components, allowing the treatment device to be worn comfortably on the head like glasses, enabling patients to move freely during treatment sessions
Solution Approach 2:
The patent changes the physical state of the treatment system from heavy, stationary optical equipment to lightweight, wearable digital displays. By transitioning from mechanical/optical prisms to software-based image manipulation, the system achieves the same therapeutic effect with dramatically reduced weight and increased portability
4Reliability
If conventional prism treatment is used, then strabismus can be corrected, but it is difficult to respond to the changing deviation angle of strabismus
Solution Approach 1:
The patent implements a feedback mechanism where the VR system continuously monitors the patient's eye position and deviation angle in real-time. Based on this feedback, the system automatically adjusts the image shifting and fusion parameters to match the current deviation angle, ensuring continuous therapeutic effectiveness as the condition evolves
Solution Approach 2:
The patent transforms the static, fixed-parameter conventional treatment into a dynamic system that automatically adapts to changing conditions. The VR system continuously adjusts its image output based on real-time tracking of eye position and deviation angle changes, providing responsive, adaptive treatment without therapist intervention
Data Source
AI summary
The present invention relates to a strabismus and heterophoria training system and method using VR, the system comprising: a VR HMD unit formed to be wearable on both eyes of a user and reproducing a visual training VR video through a display unit located in front of the both eyes; and a manager terminal unit for monitoring the user's gaze in conjunction with the VR HMD and supporting reproduction of the visual training VR video, wherein the manager terminal unit includes: a VR video module for providing a visual training VR video according to the degree of the user's strabismus and heterophoria; and a control unit for controlling image output of the VR video module.