Aberration-Neutral Corneal Correction Profile
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ophthalmological laser treatment methods for correcting the cornea often induce undesired higher order aberrations, particularly during aspherical corrections, which can lead to spherical aberrations.
Innovation Solution
A method to ascertain preoperative corneal aberrations using topographic data, model light beam passage through the cornea, and adapt the correction profile to preserve existing aberrations, ensuring that the postoperative cornea maintains the same aberration characteristics without generating new ones, by using a beam passage model to calculate wavefront aberration data and adjust the refraction correction accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a predetermined refraction correction is applied to correct the cornea, then the refraction correction is achieved, but new higher order aberrations are induced in the postoperative cornea
Solution Approach 1:
The method performs preliminary calculation of wavefront aberration data using a beam passage model before the actual laser treatment. The correction profile is pre-adapted to preserve existing higher order aberrations, so that when the treatment is executed, no new aberrations are introduced. This preliminary planning stage allows the system to anticipate and prevent aberration generation rather than correcting it afterward.
Solution Approach 2:
The invention changes the parameters of the correction profile by adapting it based on calculated wavefront aberration data. Instead of applying a standard refraction correction, the system modifies the correction profile parameters to account for the patient's specific higher order aberrations, ensuring that the treatment maintains aberration neutrality while achieving the desired refraction correction.
2Ease of manufacture
If a standard correction profile is used for refraction correction, then the treatment process is simple, but higher order aberrations are not preserved and new aberrations are generated
Solution Approach 1:
The system performs preliminary measurement of the patient's existing higher order aberrations and calculates the appropriate correction profile adjustments before treatment. This pre-planning step automates the complexity, making the actual treatment execution simple while ensuring reliable preservation of aberrations. The beam passage model and automated calculations handle the complex adaptations in advance.
Solution Approach 2:
The method uses feedback from wavefront aberration measurements to adapt the correction profile. The system measures the patient's existing aberrations, calculates how the correction will affect them using the beam passage model, and adjusts the profile accordingly. This feedback loop ensures that the treatment maintains simplicity while achieving reliable aberration preservation through data-driven adaptations.
3Manufacturing precision
If higher order aberrations are removed to achieve a perfectly corrected cornea, then visual quality is improved, but the cornea becomes more susceptible to new aberration formation
Solution Approach 1:
The invention converts the patient's existing higher order aberrations from a potential problem into a beneficial reference point. By preserving these existing aberrations rather than removing them, the treatment maintains the cornea's natural optical characteristics. The beam passage model calculates how to achieve refraction correction while maintaining aberration neutrality, effectively using the existing aberration pattern as a stable baseline that prevents new aberrations from forming.
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 prevents the formation of new higher order aberrations during corneal treatment, maintaining aberration neutrality before and after the procedure, thereby improving the accuracy and effectiveness of corneal corrections.
Implementation Method 1
a passage of light beams through the cornea, which has the topographic data, is determined by a beam passage model for calculating the wavefront aberration data
Implementation Method 2
laser pulses effect a photodisruption and/or ablation in a focus situated within the organic tissue to remove a tissue, in particular a tissue lenticule, from the cornea
Data Source
AI summary
The invention relates to a system and method for providing control data for an ophthalmological laser of a treatment apparatus for correcting a cornea. The method includes ascertaining topographic data of the preoperative cornea from predetermined examination data; calculating wavefront aberration data of the preoperative cornea by the topographic data, wherein a passage of light beams through the cornea, which has the topographic data, is determined by a beam passage model for calculating the wavefront aberration data; ascertaining an aberration-neutral correction profile, by which higher order aberrations of the preoperative cornea are preserved for a postoperative cornea, wherein a predetermined refraction correction is adapted depending on the ascertained wavefront aberration data for ascertaining the aberration-neutral correction profile; and providing the control data for correcting the cornea for the ophthalmological laser, which includes the aberration-neutral correction profile.