Personalized Near Addition Value for Myopia Control
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Solution Overview
Problem
Current methods for determining near addition values for children and young adults with myopia are not comprehensive and do not effectively consider binocular vision conditions, leading to limited efficacy in preventing myopia progression and comfort issues.
Innovation Solution
A method that measures fusional amplitudes and phoria to determine a personalized near addition value using a mathematical function, ensuring binocular vision comfort by maintaining a specific ratio between fusional amplitudes and phoria, and fine-tuning the addition value to prevent lag or lead of accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard near addition values are used for children and young adults with myopia, then myopia progression may be slowed to some extent, but binocular vision comfort is compromised and efficacy is limited
Solution Approach 1:
The patent applies parameter changes by determining a personalized near addition value based on individual binocular vision characteristics (fusional amplitudes and phoria measurements). Instead of using a fixed standard addition value, the method calculates a customized addition value that optimizes both myopia prevention efficacy and binocular vision comfort for each patient, thereby resolving the contradiction between effectiveness and comfort.
2Reliability
If higher addition values are prescribed to reduce lag of accommodation, then myopia progression is better controlled, but over-accommodation and discomfort increase
Solution Approach 1:
The patent employs feedback by using measurements of fusional amplitudes and phoria to determine the appropriate addition value. The method incorporates binocular vision status feedback into the prescription process, allowing the addition value to be adjusted based on individual tolerance and visual comfort, thus preventing over-accommodation while maintaining myopia control effectiveness.
3Reliability
If personalized addition values are determined based on binocular vision conditions, then both myopia prevention efficacy and binocular comfort are improved, but measurement and calculation complexity increases
Solution Approach 1:
The patent applies mechanics substitution by replacing complex manual measurement and calculation processes with automated optical measurement devices and computational algorithms. The system uses optical instruments to measure fusional amplitudes and phoria, then automatically calculates the personalized addition value, thereby reducing the complexity burden while maintaining high treatment effectiveness.
Data Source
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AI summary
The invention relates to a method for determining personalized near addition value for non-presbyopes, including measuring fusional amplitudes and phoria with at least one addition value, on both eyes of a person at a working distance; finding a mathematical function that predicts the change of a pair of fusional amplitudes and phoria as a function of addition value based on the addition value and the measured fusional amplitudes and phoria; and determining the near addition value according to a suitable relationship between the pair of fusional amplitudes and phoria on the mathematical function.