VR Headset Visual Field Test Automation
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Solution Overview
Problem
Traditional visual field tests are cumbersome, time-consuming, and unreliable due to the need for stationary equipment and controlled lighting environments, which can lead to fatigue and inconsistent results.
Innovation Solution
A virtual reality headset-based system that conducts visual field tests using eye and head tracking technology, allowing for automated testing in various ambient light conditions without manual input, providing improved sensitivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional stationary computerized machines are used for visual field testing, then measurement precision can be maintained, but device complexity and loss of time increase due to bulky equipment and controlled environment requirements
Solution Approach 1:
The patent replaces the traditional mechanical stationary machine with a wearable VR headset system that uses electronic displays and software-based stimulus presentation. The fixation target and test stimuli are presented through VR display elements rather than physical optotypes, eliminating the need for bulky mechanical equipment while maintaining measurement capability through electronic control of visual stimuli.
Solution Approach 2:
The VR headset system serves multiple functions: it provides fixation target presentation, stimulus delivery, eye tracking data collection, and head position monitoring all within a single wearable device. This multi-functional integration eliminates the need for separate specialized equipment for each function, reducing overall device complexity while maintaining measurement precision.
2Measurement precision
If traditional stationary machines with controlled lighting are used, then measurement precision is maintained, but loss of time increases due to setup and environment control requirements
Solution Approach 1:
The VR headset system creates its own controlled testing environment by blocking ambient light through the headset structure and generating all visual stimuli electronically through the display. The system does not require external light-controlled rooms or manual setup of testing conditions, as it self-regulates the visual environment, eliminating time-consuming setup procedures while maintaining measurement precision.
3Measurement precision
If traditional manual clicker response methods are used, then measurement precision can be achieved, but productivity decreases due to manual input requirements and test duration
Solution Approach 1:
The system implements automated feedback loops where eye tracking data continuously monitors fixation behavior and head tracking data monitors position, allowing the system to automatically detect when the examinee sees test stimuli or loses fixation. This automated detection and response eliminates manual clicker input while maintaining the ability to record accurate visual field data, significantly improving productivity without sacrificing measurement precision.
Solution Approach 2:
The manual clicker response mechanism is replaced with automated optical sensing through eye tracking cameras and head position sensors. The system automatically detects examinee responses through changes in eye movement patterns and head position rather than requiring manual button pressing, eliminating the mechanical clicker while preserving response data collection accuracy.
4Measurement precision
If traditional fixed-head positioning is required, then measurement precision is maintained, but ease of operation decreases due to head fatigue and discomfort
Solution Approach 1:
The system transitions from requiring fixed static head positioning to allowing dynamic head movement within the VR headset. Head tracking sensors continuously monitor head position and orientation, allowing the examinee to move their head naturally while the system automatically adjusts to maintain accurate spatial mapping of visual stimuli. This dynamic adaptation maintains fixation stability data quality while dramatically improving head comfort and ease of operation.
Data Source
AI summary
Virtual reality, VR, headset-based electronic systems that can be used to perform visual field tests. The systems may improve the sensitivity, consistency, and case of application of the visual field test. Other aspects are also described.