Video Oculography System for Corrective Saccade Analysis
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Solution Overview
Problem
Current Video-oculography (VOG) systems are limited in their ability to accurately track and analyze secondary and higher-order corrective saccades, which are crucial for diagnosing conditions like Traumatic Brain Injury, Progressive Supernuclear Palsy, Internuclear Ophthalmoplegia, Ocular Lateral Pulsion, and Glissades eye movements, due to limitations in frame rate and resolution, requiring more advanced technology for precise eye movement tracking.
Innovation Solution
A portable, modular VOG system with digital cameras capable of capturing eye images at rates exceeding 60 Hz and resolving movements smaller than 3 degrees, equipped with a goggle-based setup that calculates and displays corrective saccade measurements such as latency, amplitude, accuracy, and velocity, providing objective diagnostic tools for these conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional VOG systems are used, then the system structure is simple, but the measurement precision for secondary and higher-order corrective saccades is insufficient
Solution Approach 1:
The system segments the eye movement analysis into distinct components: primary saccade detection, secondary corrective saccade detection, and higher-order corrective saccade detection. Each component processes specific aspects of eye movement data independently, allowing high precision measurement of secondary and higher-order saccades while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent introduces additional temporal and spatial dimensions to the eye movement tracking. By capturing eye movements at higher frame rates and analyzing movements smaller than 3 degrees, the system adds temporal resolution and angular precision dimensions, enabling accurate detection of corrective saccades that conventional systems missed.
2Measurement precision
If higher frame rate and resolution are used to track secondary saccades, then the measurement precision improves, but the use of energy increases
Solution Approach 1:
The system applies partial action by selectively capturing and analyzing only the portions of eye movement data that are clinically relevant - specifically secondary and higher-order corrective saccades. Rather than continuously processing all eye movement data at maximum resolution, the system targets specific movement patterns, reducing overall energy consumption while maintaining high precision for diagnostic purposes.
3Reliability
If conventional VOG systems are used, then the device is portable, but the reliability for diagnosing conditions like INO and PSP is insufficient
Solution Approach 1:
The system incorporates feedback mechanisms that continuously monitor and adjust the analysis of eye movement patterns. By comparing detected saccade characteristics against established diagnostic criteria for conditions like Internuclear Ophthalmoplegia and Progressive Supernuclear Palsy, the system provides reliable diagnostic output while maintaining the portable VOG platform architecture.
Data Source
AI summary
A video oculography (VOG) system for calculation and display of Corrective Secondary Saccades Analysis is disclosed and utilized in a method for Objective Diagnostics of Internuclear Opthalmopligia, Ocular Lateral Pulsion, Progressive Supernuclear Palsy and Glissades. The method comprises the steps of using a VOG system to calculate corrective saccades. The VOG based system is configured to collect eye images of the patient in excess of 60 hz and configured to resolve eye movements smaller than at least 3 degrees of motion and collects eye movement data wherein at least one fixation target is presented to the subject in a defined position configured to yield a voluntary saccadic eye response from at least one eye of the patient. The latency, amplitude, accuracy and velocity of each respective corrective saccade and totals latency and accuracy are calculated.