Ring Halometer Veil Matching for Dysphotopsia Quantification
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Solution Overview
Problem
Conventional methods for quantifying dysphotopsias, such as glare and halos, after cataract and refractive surgery are subjective, time-consuming, and not widely adopted due to patient discomfort and age-related limitations, making them inefficient for clinical use.
Innovation Solution
A ring halometer system using a white screen with a first light source emitting a glare source and a second light source projecting a concentric light ring, controlled by an electronic device, allows patients to adjust the light ring diameter until it matches the veil of light, enabling objective quantification of dysphotopsias through a computer-implemented method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional perimetry techniques (e.g., Rostock-Glare perimeter test) are used to quantify dysphotopsias, then measurement precision is improved, but testing time increases significantly (approximately 10 minutes) and patient comfort deteriorates due to strong light sources and fixed position requirements
Solution Approach 1:
The patent applies dynamics by making the light ring adjustable in size rather than fixed. The system dynamically changes the light ring diameter to match the patient's perceived veil of light, transforming a static testing procedure into an adaptive one that reduces testing time while maintaining measurement precision through patient-driven adjustment.
Solution Approach 2:
The patent implements self-service by allowing the patient to directly control the light ring size adjustment based on their own visual perception. The patient activates the adjustment mechanism when the light ring matches their veil of light, eliminating the need for examiner judgment and reducing testing time while maintaining objective measurement.
2Measurement precision
If conventional perimetry techniques are used to quantify dysphotopsias, then measurement precision is improved, but ease of operation deteriorates due to strong light sources and fixed position requirements that cause patient discomfort
Solution Approach 1:
The system dynamically adjusts the light ring size to match the patient's veil of light, replacing fixed-position testing with an adaptive approach. This maintains measurement precision while improving patient comfort by allowing flexible testing conditions and eliminating the need for prolonged fixed-position viewing.
Solution Approach 2:
The patent changes the parameter of light ring diameter to match the patient's perceived veil size. By adjusting this key parameter dynamically rather than using fixed strong light sources, the system maintains measurement accuracy while improving patient comfort and ease of operation.
3Ease of operation
If clinical questionnaires are used to assess dysphotopsias, then ease of operation is improved (simple patient response), but measurement precision deteriorates due to subjective variability and lack of quantitative data
Solution Approach 1:
The patent replaces the subjective mechanical process of questionnaire answering with an objective optical measurement system. Instead of relying on patient description and examiner interpretation, the system uses optical principles to directly measure and quantify the veil of light, providing precise quantitative data while maintaining ease of patient interaction.
Solution Approach 2:
The system introduces an intermediary measurement mechanism (the adjustable light ring and veil matching process) that bridges patient subjective perception with objective quantitative measurement. This intermediary process translates patient visual experience into precise measurable data without requiring complex questionnaire analysis.
4Productivity
If presbyopia correcting IOLs are used to improve vision, then functional performance is improved, but harmful factors increase due to higher levels of dysphotopsias (glare, halos, starbursts)
Solution Approach 1:
The patent converts the harmful dysphotopsias generated by presbyopia correcting IOLs into a measurable diagnostic parameter. By using the veil of light caused by the IOL to match the light ring size, the system transforms the harmful visual phenomenon into a useful measurement tool for quantifying and comparing IOL performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a rapid and objective assessment of dysphotopsias, correlating well with clinical questionnaires, offering a more precise and less invasive method for quantifying the level of bothersomeness of entopic phenomena.
Implementation Method 1
The glare source is configured to form a veil of light visible to the patient due to the light scattered from an optical surface of the patient's eye
Implementation Method 2
a second light source (stimulus) configured to project a light ring concentric with the glare source emitted from the first light source on the white screen
Data Source
AI summary
A ring halometer system configured to quantify dysphotopsias in a patient. The system includes a white screen and a first light source configured to emit a glare source from the white screen. The glare source is configured to form a veil of light visible to the patient when the glare source interacts with an optical surface of the eye of the patient. The system also includes a second light source configured to project a light ring with varying luminance concentric with the glare light source on the white screen, and a controller coupled to the second light source configured to adjust a size of the light ring. The system may also include an electronic device configured to determine a level of bothersomeness of the dysphotopsias experienced by the patient based on the size of the light ring.