Intraocular Lens Selection Using Ray-Traced Pseudophakic Eye Models
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Solution Overview
Problem
Existing methods for selecting intraocular lenses (IOLs) during cataract surgery rely on limited pre-operative diagnostic information and simple optical analyses, making it difficult to determine the optimal lens for a specific patient, thereby impacting vision quality.
Innovation Solution
A system and method using ray tracing to calculate light propagation through a pseudophakic eye model, incorporating pre-operative anatomic data to determine metrics such as point spread function and modulation transfer function, enabling selection of the most suitable IOL based on these metrics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If simple optical analyses are used for IOL selection, then the process is easier and faster, but the accuracy of predicting retinal focus and visual performance deteriorates
Solution Approach 1:
The patent replaces simple optical analyses with a ray tracing module that uses computational optics to simulate light propagation through the eye. This substitution enables more accurate prediction of retinal focus and visual performance while maintaining ease of operation through automated processing of pre-operative anatomic data.
Solution Approach 2:
The patent changes the parameters used in optical analysis from simple formulas to comprehensive ray tracing simulations that incorporate multiple wavelengths, pupil characteristics, and detailed eye anatomy. This parameter enhancement improves prediction accuracy without significantly increasing operational complexity.
2Productivity
If limited pre-operative diagnostic information is used, then the diagnostic process is simpler and faster, but the ability to determine optimal IOL deteriorates
Solution Approach 1:
The patent performs preliminary processing of pre-operative anatomic data to create a comprehensive eye model before IOL selection. This preliminary action includes extracting relevant parameters such as axial length, corneal curvature, and pupil characteristics, enabling reliable IOL selection while maintaining efficient workflow.
Solution Approach 2:
The patent introduces a projection module as an intermediary that bridges pre-operative diagnostic information and IOL selection. This module projects and imputes post-operative variables based on pre-operative data, enhancing reliability without significantly delaying the selection process.
3Measurement precision
If comprehensive ray tracing analysis is performed, then the accuracy of visual performance prediction improves, but the computational complexity and time required increases
Solution Approach 1:
The patent segments the comprehensive optical analysis into distinct functional modules: a ray tracing module for light propagation simulation, a projection module for data processing, and a metrics calculation module for performance evaluation. This segmentation manages complexity while maintaining high accuracy in visual performance prediction.
4Measurement precision
If multiple wavelengths are analyzed, then the accuracy of optical metrics improves, but the computational time and complexity increases
Solution Approach 1:
The patent implements partial action by analyzing multiple wavelengths selectively rather than exhaustively. The ray tracing module processes wavelengths relevant to human vision (including visible spectrum wavelengths) to achieve accurate optical metrics while optimizing computational efficiency by focusing on clinically significant wavelength ranges.
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 accuracy of predicting retinal focus and visual performance by matching the anatomy of the pseudophakic eye, leading to a better selection of IOLs.
Implementation Method 1
The ray tracing module is adapted to calculate propagation of light through the eye
Data Source
AI summary
A system and method for selecting a preferred intraocular lens, for implantation into an eye, includes a controller having a processor and a tangible, non-transitory memory on which instructions are recorded. The controller is in communication with a diagnostic module adapted to store pre-operative anatomic data of the eye as an eye model. The controller is configured to determine respective imputed post-operative variables for each of a plurality of intraocular lenses, via a projection module. A respective pseudophakic eye model is generated for each of the plurality of intraocular lenses by incorporating the respective imputed post-operative variables into the eye model. A ray tracing module is executed in the respective pseudophakic eye model to determine at least one respective metric for the plurality of intraocular lenses. The preferred intraocular lens is selected based on a comparison of the respective metric.