Astigmatism Correction Data Fusion for Ophthalmological Laser Control
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Solution Overview
Problem
There is a discrepancy in astigmatism correction data obtained from visual disorder data and corneal measurement data, leading to uncertainty in which data to base corrections on, resulting in inconsistent treatment outcomes.
Innovation Solution
A method that combines refractive astigmatism and corneal toricity data using specific combination rules to generate improved astigmatism correction data for ophthalmological lasers, considering the differences between the two data sources to optimize treatment results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If astigmatism correction is based on visual disorder data (refraction values), then the correction can be planned using subjective refraction measurements, but the correction may not accurately reflect the actual corneal morphology
Solution Approach 1:
The patent combines refraction data (subjective astigmatism) and corneal measurement data (objective astigmatism) into a unified astigmatism correction plan. The control device integrates both data sources to calculate a composite astigmatism value that reflects both the patient's visual disorder and the actual corneal morphology, thereby resolving the discrepancy between the two measurement methods.
2Measurement precision
If astigmatism correction is based on corneal measurement data (topography), then the actual corneal morphology is captured, but the correction may not align with the patient's visual symptoms
Solution Approach 1:
The control device merges corneal topography data (objective astigmatism) with refraction data (subjective astigmatism) to create a comprehensive correction plan. This integration ensures that the laser treatment addresses both the actual corneal shape and the patient's visual symptoms, resolving the disconnect between morphology and visual disorder.
3Productivity
If only one data source is used for astigmatism correction, then the treatment process is simplified, but the treatment outcome consistency is reduced
Solution Approach 1:
The control device employs feedback mechanisms to evaluate and adjust the astigmatism correction plan based on the relationship between refraction data and corneal measurement data. The system analyzes the discrepancy between the two data sources and modifies the correction parameters accordingly, ensuring consistent treatment outcomes while managing data processing complexity through automated feedback loops.
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
This approach ensures better treatment outcomes by effectively combining both data sources, minimizing overcorrection and preserving corneal tissue, while addressing the discrepancies in astigmatism values from different measurement methods.
Implementation Method 1
pulsed lasers and a beam focusing device can for example be formed such that laser pulses effect a photodisruption and/or ablation in a focus situated within the organic tissue, to remove a tissue
Implementation Method 2
pulsed lasers and a beam focusing device can for example be formed such that laser pulses effect a photodisruption and/or ablation in a focus situated within the organic tissue, to remove a tissue
Data Source
AI summary
The invention relates to a method for providing control data for an ophthalmological laser (12) of a treatment apparatus (10) for correcting an astigmatism, comprising as steps determining (S10) first astigmatism values from predetermined visual disorder data of a patient, wherein the visual disorder data provides a measured refraction of a patient; determining (S12) second astigmatism values from predetermined measurement data of a cornea (16) of the patient, wherein the measurement data provides a morphology of the cornea (16); ascertaining (S14) astigmatism correction data for the astigmatism correction of the cornea (16), wherein the first and second astigmatism values are combined by a combination rule for ascertaining the astigmatism correction data; and providing (S16) the control data for the ophthalmological laser (12), which includes the ascertained astigmatism correction data.