IOL-Specific Dioptric Power Calculation from Wavefront Aberrations
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Solution Overview
Problem
Conventional methods for calculating the dioptric power of an eye wearing an intraocular lens (IOL) lack reliability due to the use of a uniform method regardless of the IOL type, leading to inconsistent results.
Innovation Solution
An ophthalmic information processing apparatus that calculates dioptric power based on wavefront aberration information, incorporating IOL-specific optical characteristics to adjust the calculation processing method accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a uniform calculation method is used for all IOL types, then the calculation process is simple and consistent, but the reliability of the dioptric power calculation result decreases
Solution Approach 1:
The patent segments the calculation processing into multiple methods based on IOL type. The calculator unit selects and applies different calculation methods (first calculation method, second calculation method, or third calculation method) depending on whether the IOL is monofocal, multifocal, or EDoF type, respectively. This segmentation resolves the contradiction by improving reliability through type-specific calculations while managing complexity through systematic classification.
Solution Approach 2:
The patent applies local quality by tailoring the calculation method to each specific IOL type. Each IOL category (monofocal, multifocal, EDoF) receives a customized calculation approach optimized for its optical characteristics. This ensures high reliability for each local case while the overall system maintains structured complexity through clear classification rules.
2Measurement precision
If different calculation methods are used for different IOL types, then the reliability of calculation result improves, but the complexity of the calculation processing increases
Solution Approach 1:
The patent implements dynamics by making the calculation method adaptable and changeable based on input conditions. The calculator unit dynamically selects the appropriate calculation method according to the IOL type information received. This dynamic adaptation improves measurement precision for each IOL type while the system manages complexity through automated selection logic rather than fixed complex structures.
Solution Approach 2:
The patent changes the calculation parameters and methods based on the IOL type parameter. When the IOL type is identified as monofocal, multifocal, or EDoF, the system adjusts the calculation approach accordingly. This parameter-driven adaptation improves measurement accuracy while maintaining systematic complexity management through clear parameter-based classification.
3Reliability
If a single calculation method is applied to all IOLs, then the processing system remains simple, but the consistency of results across different IOL types deteriorates
Solution Approach 1:
The patent achieves universality by creating a multi-functional calculator unit that can perform multiple calculation methods within a single integrated system. The calculator handles monofocal, multifocal, and EDoF IOL types using different methods, ensuring consistent and reliable results across all IOL types while maintaining a unified processing architecture that manages complexity systematically.
Data Source
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AI summary
This ophthalmic information processing device calculates the refractive power of an examined eye wearing an intraocular lens on the basis of wavefront aberration information obtained by conducting wavefront aberration measurement for the examined eye. The ophthalmic information processing device comprises an acquisition unit and a calculation unit. The acquisition unit acquires at least intraocular lens information representing the optical characteristics of the intraocular lens. The calculation unit uses the intraocular lens information to change a refractive power calculation process method and calculate the refractive power of the examined eye.