Multifocal Lens Simulator for Presbyopia Correction
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Solution Overview
Problem
Current multifocal contact lenses often fail to adequately correct presbyopia, particularly in addressing astigmatism and the varying needs of near and distance vision across different pupil sizes and object distances, necessitating a system that can simulate and optimize lens design for individual patients.
Innovation Solution
A multifocal lens simulator system comprising an input device, processor, and display device that generates simulated images based on pupil and lens design information, including aberrations, to provide improved contrast for near and distance vision, and supports various multifocal lens designs by calculating point spread functions and phase maps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multifocal contact lenses are designed to provide multiple powers for near and distance vision, then the lens can address presbyopia, but the lens design becomes complex and difficult to optimize for individual patient needs
Solution Approach 1:
The system allows customization of multiple lens design parameters including add power, center zone diameter, intermediate zone diameter, and optical axis alignment. By enabling independent adjustment of these parameters, the system can optimize lens performance for each patient's specific presbyopia condition without requiring complex manual calculations or trial-and-fit approaches.
2Measurement precision
If the lens design is customized for individual patients with specific design variables, then the imaging performance can be optimized, but the evaluation process requires thorough assessment over multiple variables which increases time and complexity
Solution Approach 1:
The system pre-calculates and stores optimal lens design parameters based on patient input data (age, pupil diameter, presbyopia severity). This preliminary computation allows the system to quickly retrieve and display customized lens designs without requiring time-consuming manual evaluation of multiple design variables during the clinical consultation.
Solution Approach 2:
The system creates simulated images that replicate what the patient will actually see through the customized multifocal lens design. By generating these visual simulations based on calculated parameters, the system allows clinicians and patients to evaluate imaging performance accurately without requiring physical trial lenses or extended testing procedures.
3Adaptability or versatility
If the system supports multiple types of custom lens designs, then versatility is improved, but the device complexity increases to accommodate different design configurations
Solution Approach 1:
The system implements a unified computational framework that can handle multiple lens design types (center-near, center-distance, asymmetric, astigmatic corrections) through a single integrated algorithm. This universal approach allows the system to support diverse custom lens designs without requiring separate specialized tools or procedures for each design type, thereby managing complexity while maintaining versatility.
Data Source
AI summary
An apparatus for generating simulated images includes an input device, a processor and a display device. The input device is configured to input information on a pupil of an eye and design information for a multifocal lens. The processor is configured to generate, based on the inputted pupil information and design information, a simulated image that is visible to the eye when the multifocal lens is disposed in the eye. The display device is configured to display the simulated image generated by the processor.