Prismatic Lens Prescription for Binocular Dynamic Alignment
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Solution Overview
Problem
Existing methods for addressing eye misalignment, including static misalignment, fail to effectively alleviate symptoms such as headaches and migraines in a significant fraction of patients, as they do not account for dynamic misalignments between the eyes during activities like reading and driving, which cause conflicting stimuli and muscle tension.
Innovation Solution
A method and system for determining binocular dynamic alignment using eye trackers and displays to measure and quantify dynamic alignment differentials, allowing for the prescription of prismatic lenses to reduce these misalignments by optimizing eye and head movements during activities like reading and driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static misalignment measurement methods are used, then diagnostic simplicity is maintained, but dynamic misalignment detection capability is insufficient
Solution Approach 1:
The patent replaces traditional mechanical alignment measurement devices with an eye tracking system that uses optical sensors and computational algorithms to detect eye position and movement dynamics, enabling precise measurement of dynamic misalignment without mechanical contact
Solution Approach 2:
The patent introduces a display device as an intermediary that presents visual targets to stimulate eye movements, allowing the eye tracking system to capture dynamic alignment data through the medium of visual stimulus-response interaction
2Measurement precision
If dynamic alignment measurement is implemented, then comprehensive misalignment diagnosis is achieved, but measurement time increases
Solution Approach 1:
The patent employs periodic target shifts at controlled intervals to elicit repeated eye movement responses, allowing multiple measurements to be taken during a single diagnostic session to capture dynamic alignment characteristics across different time points
Solution Approach 2:
The patent maintains continuous eye tracking throughout the diagnostic procedure, recording eye position data continuously as targets shift, thereby capturing complete dynamic alignment information without interruption or repeated setup
3Reliability
If prism prescription is optimized for dynamic alignment, then symptom relief is improved, but prescription complexity increases
Solution Approach 1:
The patent transitions from static prism prescription based on fixed alignment measurements to dynamic prism prescription that accounts for eye movement trajectories and temporal characteristics, allowing the prescription to be optimized for actual functional use during reading and other near-work activities
Solution Approach 2:
The patent utilizes multiple measured parameters including target acquisition time, saccade duration, and dynamic alignment differential to inform prism prescription decisions, changing the basis of prescription from single static values to multiple dynamic parameters that better reflect functional vision
Data Source
AI summary
A method for determining a binocular dynamic alignment can include the following steps: causing a patient to gaze at a starting target with a left eye and a right eye, with a display; shifting the target in a first direction by a first target shift angle at a first target shift time, with the display; measuring a first dynamic alignment differential between the left eye and the right eye acquiring the first-shifted target, with an eye tracker; shifting the first-shifted target in a second direction at a second target shift time, with the display; measuring a second dynamic alignment differential between the left eye and the right eye acquiring the second-shifted target with the eye tracker; determining an average dynamic alignment differential from the first dynamic alignment differential and the second alignment differential, with a computer; and determining a prescription prism to reduce the average dynamic alignment differential.