Customized Multifocal IOLs for Patient-Specific Visual Acuity
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Solution Overview
Problem
Existing multifocal intraocular lenses (IOLs) do not adequately tailor optical attributes to individual patient needs, leading to varying degrees of patient satisfaction due to limitations in accommodating presbyopia and cataract-related vision issues.
Innovation Solution
Customized multifocal IOLs are designed using a system that considers patient-specific lifestyle parameters and eye factors, such as pupil size, viewing conditions, and cataract grade, to select and tailor the lens characteristics, including diffractive and refractive elements, to optimize visual performance across different distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing multifocal IOLs are used with a one-size-fits-all approach, then the lens structure can be standardized and manufactured easily, but patient satisfaction varies due to inability to tailor optical attributes to individual needs
Solution Approach 1:
The patent applies dynamics by making the IOL design adaptable and adjustable based on patient-specific parameters. The system dynamically selects optical attributes (add power, pupil size, viewing distance) based on individual patient needs, transforming a static one-size-fits-all lens into a dynamic, customized solution that adapts to each patient's presbyopia severity and lifestyle requirements
Solution Approach 2:
The patent implements parameter changes by varying key optical parameters of the IOL including add power, effective pupil size, and viewing distance based on patient-specific measurements. The system calculates and adjusts these parameters to optimize visual performance for each individual, moving from fixed standardized parameters to variable patient-tailored parameters
2Ease of operation
If multifocal IOLs use diffractive optical surfaces to direct light to different focal distances, then patients can see both near and far objects, but patient satisfaction still varies due to lack of customization
Solution Approach 1:
The patent applies local quality by optimizing specific regions of the IOL optical surface based on patient-specific parameters. The diffractive optical surface is designed with local variations in power and pupil size that are tailored to each patient's needs, creating zone-specific optical properties rather than uniform characteristics across the entire lens surface
Solution Approach 2:
The system implements feedback by using patient-specific measurements (pupil size, viewing distance, add power requirements) to inform and adjust the IOL design parameters. This feedback loop ensures that the final lens configuration is optimized based on actual patient characteristics and visual needs, improving satisfaction consistency
3Ease of manufacture
If a standardized multifocal IOL design is used for all patients, then manufacturing and implantation processes are simplified, but visual performance cannot be optimized for individual patients
Solution Approach 1:
The patent applies segmentation by dividing the patient population into segments based on specific parameters (pupil size, add power, viewing distance) and designing optimized IOL variants for each segment. This allows standardized manufacturing within each segment while achieving precision customization across different patient groups, balancing production efficiency with individualized care
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
The customized IOLs enhance patient satisfaction by providing improved visual acuity and depth of focus, reducing halos and scatter, and extending the reading distance, thereby effectively mitigating presbyopia and cataract-related vision impairments.
Implementation Method 1
Multifocal IOLs may, for example, rely on a diffractive optical surface to direct portions of the light energy toward differing focal distances
Implementation Method 2
the lens of the eye to become rounder or more convex, and thus increase the optical power and ability of the eye to focus at near distances
Data Source
AI summary
System and method for customizing multifocal ophthalmic lenses, such as an intraocular lens (IOL) or the like, that may be tailored for an individual patient or group of patients beyond the selection of a particular IOL power. One or more eye factors of the patient are determined, a set of different multifocal intraocular lenses having a similar base power are determined based on the eye factors, and a multifocal intraocular lens is selected for the patient from the set based on the eye factors.