Corneal Cut Rotation Planning for Cyclotorsion Alignment
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Solution Overview
Problem
Existing refractive eye surgery methods, such as LASIK and SMILE, face challenges due to deviations between the ocular coordinate system of the patient and the treatment apparatus coordinate system, leading to non-optimal correction and visual defects from angle deviations like cyclotorsion and mechanical tolerances, which are not accurately quantified in prior art.
Innovation Solution
A planning device and method that facilitate the rotation of cut surfaces about an axis parallel to the ocular axis, allowing for precise alignment and compensation of angular deviations through manual or algorithmic adjustment, enabling optimal cut placement in the cornea.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment methods are used to compensate for angular deviations, then the surgeon can adjust for cyclotorsion and mechanical tolerances, but the process is time-consuming and less precise
Solution Approach 1:
The patent replaces manual mechanical alignment methods with an automated image processing system. The planning device automatically detects anatomical features, calculates angular deviations, and determines the rotation angle of cut surfaces, eliminating the need for time-consuming manual measurement and adjustment while improving precision through computational algorithms.
Solution Approach 2:
The system performs self-alignment by automatically detecting the patient's eye anatomy and calculating the required rotation compensation. The planning device independently determines the rotation angle of cut surfaces based on detected anatomical features, without requiring continuous manual intervention from the surgeon during the alignment process.
2Productivity
If automated alignment is implemented, then adjustment time is reduced, but the complexity of the planning device increases
Solution Approach 1:
The planning device integrates multiple functions into a single system: it detects anatomical features, calculates angular deviations, determines rotation angles of cut surfaces, and generates surgical guidance. This multi-functional approach consolidates what would otherwise require separate tools and manual procedures into one integrated device, improving efficiency without proportionally increasing complexity.
3Manufacturing precision
If cut surfaces are rotated to compensate for angular deviations, then alignment precision is improved, but the risk of visual defects from angle deviations increases if not accurately quantified
Solution Approach 1:
The system continuously monitors and measures the actual position of anatomical features during surgery, comparing it against the planned cut surface rotation. This feedback mechanism allows the system to verify that the rotation compensation is accurate and to make real-time adjustments if necessary, ensuring both precision and reliability by closing the loop on the alignment process.
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
Enhances the precision of refractive surgery by allowing physicians to accurately align cuts based on patient-specific anatomical features, reducing the risk of visual defects and improving surgical outcomes.
Implementation Method 1
When generating cut surfaces in the cornea by application of laser radiation, the optical radiation effect is usually exploited by virtue of optical breakdown being generated by individual optical pulses
Data Source
AI summary
A planning device for generating control data for a treatment apparatus which produces at least one cut surface in the cornea by operation of a laser device, and to a treatment apparatus including a planning device of the specified type. Also, a method for generating control data for such a treatment apparatus, and a method of eye surgery. In this case, a rotation of the cut surface about an axis running substantially parallel to the ocular axis is facilitated during the determination of the cut surfaces.