Refractive Surgery Aberration Correction via Simulation
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Solution Overview
Problem
Current refractive surgery systems often introduce or amplify high-order optical aberrations, which can reduce visual acuity and are not effectively corrected by traditional optical correction methods like glasses or contact lenses.
Innovation Solution
A method and system for evaluating and improving refractive surgery by adjusting refractive surgery system parameters such as wavefront device variables, laser ablation profile variables, and microkeratome variables to inhibit induced aberrations, using metrics like root mean squares error and treatment time, to achieve optimal optical surface shaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wavefront-guided refractive surgery is performed to correct optical aberrations, then visual acuity can be improved, but the surgery may introduce or amplify high-order aberrations
Solution Approach 1:
The patent applies preliminary anti-action by using a simulation model to predict and compensate for induced aberrations before the actual surgery. The system calculates the expected aberrations from various surgical parameters and adjusts the ablation profile in advance to counteract these effects, thereby preventing rather than just treating the harmful outcome.
Solution Approach 2:
The patent implements feedback by using a simulation model that incorporates measured parameters from the actual surgical system (laser characteristics, tracking accuracy, registration precision) to predict outcomes. This creates a closed-loop system where the simulation feedback guides parameter optimization to minimize induced aberrations while achieving the desired visual correction.
2Manufacturing precision
If multiple system parameters are adjusted to inhibit induced aberrations, then optical quality can be improved, but the complexity of the surgical system increases
Solution Approach 1:
The patent applies preliminary action by performing comprehensive simulations and parameter optimizations before the actual surgery. All adjustments to laser ablation profiles, tracking parameters, and registration settings are calculated and finalized in advance using the simulation model, allowing the actual surgical system to execute a pre-optimized parameter set without requiring complex real-time adjustments.
3Measurement precision
If simulation modeling is used to predict and characterize induced aberrations, then treatment planning can be optimized, but the treatment time and computational requirements increase
Solution Approach 1:
The patent applies partial action by implementing a hierarchical simulation approach that focuses computational resources on the most significant error sources. Rather than modeling every possible parameter with equal detail, the system identifies and prioritizes the dominant contributors to induced aberrations (such as laser beam uniformity, tracking accuracy, and registration precision) for detailed simulation, while using simplified models for less significant factors.
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 effectively reduces post-operative high-order aberrations, achieving a total high-order RMS of about 0.1 µm or less, significantly improving visual acuity and optical quality compared to pre-operative levels.
Implementation Method 1
laser ablation profile variable
Data Source
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AI summary
Optical correction methods, devices, and systems reduce optical aberrations or inhibit refractive surgery induced aberrations. Error source control and adjustment or optimization of ablation profiles or other optical data address high order aberrations. A simulation approach identifies and characterizes system factors that can contribute to, or that can be adjusted to inhibit, optical aberrations. Modeling effects of system components facilitates adjustment of the system parameters.