Anterior Segment Imaging for Accurate IOL Positioning
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Solution Overview
Problem
Existing techniques for imaging and analyzing the anterior segment of the eye are limited in their ability to provide accurate, quantitative measurements of the entire segment, particularly due to issues with image tilt and depth of focus, which can lead to incorrect calculations for intraocular lens (IOL) positioning and movement.
Innovation Solution
The method involves detecting and analyzing images of the anterior segment of the eye to identify reference structures and landmarks, such as the scleral spur, Schwalbe's line, and ciliary body apex, using multiple points to define reference planes and calculate quantitative dimensions, thereby improving the accuracy of IOL selection and positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional UBM imaging is used to evaluate only one anterior angle, then the imaging process is simple and quick, but the measurement precision and completeness of the entire anterior segment is insufficient
Solution Approach 1:
The patent divides the anterior segment imaging into multiple sequential positions (first position and second position), capturing different regions systematically. This segmentation approach enables comprehensive coverage of the entire anterior segment while maintaining manageable imaging complexity at each position.
Solution Approach 2:
The patent introduces a positional dimension by imaging at multiple locations (different angles/positions) rather than relying on a single view. This multi-dimensional approach allows reconstruction of complete anterior segment geometry, improving measurement precision through spatial sampling.
2Measurement precision
If multiple images are required to analyze the entire anterior segment, then the measurement precision improves, but the loss of time and operational complexity increases
Solution Approach 1:
The patent performs preliminary imaging at multiple positions before final analysis, capturing all necessary spatial data in advance. This preliminary multi-position imaging establishes a complete geometric foundation that streamlines subsequent quantitative analysis, reducing overall processing time despite multiple captures.
Solution Approach 2:
The patent merges multiple images from different positions into a unified quantitative analysis of the entire anterior segment. By integrating data from first and second position images, the system achieves comprehensive measurement precision while consolidating analysis into a coordinated process.
3Reliability
If images are tilted or in paraxial locations, then the ease of operation is maintained, but the measurement precision and reliability of anterior segment dimensions deteriorates
Solution Approach 1:
The patent changes the imaging parameter by capturing images at multiple specific positions rather than relying on single optimized views. This multi-position parameter approach compensates for tilt and paraxial effects by providing redundant spatial data that can be analyzed to extract accurate dimensional information regardless of individual image orientation.
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 allows for more precise characterization of the anterior segment, enhancing the prediction of IOL position and movement, which can improve refractive outcomes in cataract surgery and other clinical procedures.
Implementation Method 1
Ultrasound biomicroscopy (UBM) is one such technique used to image the anterior segment of the eye using high frequency ultrasound
Data Source
AI summary
What is provided are methods of analyzing at least one image of the anterior segment of an eye and for selecting an intraocular lens (IOL). The methods may include detecting at least one image from an anterior segment of the eye; identifying a location of a reference structure on the eye using a plurality of points of a landmark on the anterior segment of the eye; and calculating at least one quantitative dimension of the anterior segment of the eye using the reference structure. The newly identified landmarks and quantifiable dimensions improve the characterization of the anterior segment in order to better predict the position and movement of the intraocular lens. The improved methods for analyzing the imaging of the anterior segment of the eye allows for improvements in the refractive outcomes of cataract surgery, glaucoma procedures, refractive outcomes, and other eye-related diseases.