Customized Multifocal IOL Design for Patient-Specific Vision
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Solution Overview
Problem
Existing multifocal intraocular lenses (IOLs) often fail to adequately address individual patient needs, leading to unsatisfactory visual performance and accommodation issues due to a one-size-fits-all approach, particularly in mitigating presbyopia and cataract-related vision challenges.
Innovation Solution
Customized multifocal IOLs are designed and selected based on patient-specific parameters such as pupil size, viewing conditions, lifestyle, and eye factors, incorporating refractive and diffractive techniques to tailor optical attributes for improved focus and depth of field, allowing for adjustments and combinations with other ophthalmic treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a one-size-fits-all multifocal IOL design is used, then the device complexity is reduced and manufacturing is simplified, but the adaptability to individual patient needs deteriorates
Solution Approach 1:
The invention segments the multifocal IOL design into multiple discrete options, each optimized for specific patient characteristics. The system divides the patient population into categories based on pupil size, lifestyle, and visual needs, then assigns specific lens designs to each category. This segmentation allows customization without requiring a completely unique lens for every patient.
Solution Approach 2:
The invention applies local quality by tailoring specific optical characteristics of the IOL to match local patient needs. Different zones or regions of the lens are designed with specific optical properties (e.g., diffractive patterns, refractive indices) that address particular patient requirements such as near vision, intermediate vision, or distance vision priorities based on their lifestyle and visual demands.
2Manufacturing precision
If standardized multifocal IOLs are used, then the ease of manufacture is improved, but the visual performance satisfaction deteriorates
Solution Approach 1:
The invention utilizes parameter changes by varying key optical parameters (such as add power, diffractive step height, zone diameters) across different IOL models within the standardized platform. These parameter variations are made in response to measured patient parameters like pupil size and age, allowing the same manufacturing process to produce lenses with different optical characteristics that reliably address individual visual needs.
3Reliability
If customized multifocal IOLs are designed for each patient, then patient satisfaction is improved, but the device complexity and selection process become more complex
Solution Approach 1:
The invention applies preliminary action by pre-categorizing patients into groups based on their pupil size, age, and lifestyle characteristics before lens selection. The system performs preliminary assessments and assigns patients to specific IOL categories based on established criteria, which simplifies the final selection process. This preliminary classification reduces the complexity of the decision-making process while maintaining high levels of customization and patient satisfaction.
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 tailored optical performance, improving focus and depth of field, and extending the range of viewing distances, thereby mitigating presbyopia and cataract-related vision impairments more effectively than standard IOLs.
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 treatment comprises an adjustment to the refraction of the eye with the custom intraocular lens, comprising a laser assisted refractive ophthalmic surgery
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.