Optimizing Spectacle Lenses for Intraocular Lens Wearers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for manufacturing spectacle lenses do not adequately account for the unique properties of eyes with implanted intraocular lenses (IOLs), leading to suboptimal correction of vision disorders.
Innovation Solution
A computer-implemented method for calculating or optimizing spectacle lenses by defining an individual eye model that includes parameters such as the shape and power of the cornea, cornea-lens distance, lens parameters, and lens-retina distance, based on individual refraction data and intraocular lens data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard spectacle lens manufacturing methods are used for eyes with implanted intraocular lenses, then the manufacturing process remains simple and universal, but the vision correction quality is suboptimal because the unique properties of IOL eyes are not accounted for
Solution Approach 1:
The eye model is segmented into distinct components (cornea, aqueous humor, intraocular lens, vitreous humor, retina) with individual parameters for each. This allows the manufacturing process to account for the unique properties of IOL eyes while maintaining a systematic approach to lens optimization.
Solution Approach 2:
The patent applies preliminary action by pre-defining the eye model parameters based on typical IOL characteristics before the actual lens manufacturing process. This preliminary modeling enables the optimization algorithm to start with informed assumptions about the IOL eye's optical properties, improving correction quality from the outset.
2Manufacturing precision
If standard eye models are used for spectacle lens calculation, then the calculation process remains simple and fast, but the imaging quality on the retina is suboptimal for IOL wearers
Solution Approach 1:
The patent applies local quality by optimizing the spectacle lens design for specific zones of the eye, particularly focusing on the central visual axis where IOL eyes require the most precise correction. The eye model incorporates location-specific parameters that account for the IOL's position and the cornea's curvature variations.
Solution Approach 2:
The patent implements parameter changes by adjusting key optical parameters in the eye model, such as the cornea's radius of curvature and the IOL's effective lens position, to reflect the actual optical state of IOL wearers. These parameter modifications enable more accurate ray tracing and wavefront analysis for optimized lens design.
3Adaptability or versatility
If individual measurement data is collected for IOL wearers, then the spectacle lens can be better adapted to the individual eye, but the measurement and data collection process becomes more complex
Solution Approach 1:
The patent applies universality by designing a measurement and modeling system that can handle both standard eyes and IOL eyes through a unified framework. The eye model structure remains consistent, but parameters are adjusted based on whether the patient has an IOL, allowing the same system to serve multiple patient types without requiring entirely separate measurement protocols.
Solution Approach 2:
The patent implements feedback by using the collected individual measurement data (such as corneal topography and IOL position) to iteratively refine the eye model parameters. This feedback loop ensures that the final spectacle lens design is optimized based on the actual measured characteristics of the patient's eye, improving individual adaptability.
Data Source
AI summary
Optimizing a spectacle lens for a wearer of implanted intraocular lenses. The method includes providing individual refraction data on the at least one eye of the spectacle wearer; defining an individual eye model in which at least a shape and/or power of a cornea, in particular a corneal front surface, of a model eye, a cornea-lens distance, parameters of the lens of the model eye, and a lens-retina distance are defined as parameters of the individual eye model. Here, defining the parameters of the individual eye model takes place on the basis of data on visual acuity correction of the at least one eye having the intraocular lens and further on the basis of individual measurement values for the eye of the spectacle wearer and/or standard values and/or on the basis of the provided individual refraction data such that the model eye has the provided individual refraction data.