Multifocal Ophthalmic Simulator Using Dual Badal Channels
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Solution Overview
Problem
Current methods for simulating multifocal ophthalmic corrections, such as simultaneous vision systems in contact and intraocular lenses, often result in suboptimal patient adaptation due to trial and error processes and limitations in simulating retinal image superposition, leading to issues with contrast and resolution, especially in intraocular lenses where trial and error is not feasible.
Innovation Solution
A purely optical system using mirrors, beam splitters, and Badal systems to create two optical channels with different vergences that produce perfectly superimposed retinal images of the same size, eliminating artifacts from different optical magnifications and allowing for versatile simulation of near and distant vision corrections without the need for complex equipment or software.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If trial and error procedure is used to identify suitable simultaneous vision contact lenses, then patient adaptation can be evaluated, but multiple visits and time are required
Solution Approach 1:
The invention creates an optical copy of the simultaneous vision effect using a trial lens system that replicates the retinal image superposition produced by multifocal contact lenses. This allows patients to experience and evaluate the visual effect before actual lens fitting, eliminating the need for multiple trial lens visits and extended adaptation periods.
2Reliability
If simultaneous vision systems are used in intraocular lenses, then presbyopia correction is achieved, but trial and error process is not feasible
Solution Approach 1:
The invention enables preliminary evaluation of simultaneous vision correction效果 through a trial optical system before intraocular lens implantation. Patients can assess their adaptation to the visual effect in advance, allowing surgeons to predict post-operative outcomes and adjust the optical design parameters before the irreversible surgical procedure.
3Measurement precision
If conventional Badal system is used to simulate different distances, then convergence is induced without changing magnification, but superposition of images like in simultaneous vision is not achieved
Solution Approach 1:
The invention divides the optical system into two separate channels: one channel maintains the conventional Badal system for accurate convergence simulation without magnification change, while the other channel introduces additional optical elements to achieve image superposition. This segmentation allows each channel to fulfill its specific function while working together to solve both problems simultaneously.
4Ease of manufacture
If phase masks are used for simulation, then cost is reduced, but centration problems and fixed design occur
Solution Approach 1:
The invention replaces fixed phase masks with dynamic trial lenses that can be positioned and adjusted during the evaluation process. The trial lens system allows for dynamic adjustment of optical parameters including centration, addition power, and design type, providing versatility while maintaining cost-effectiveness through simple optical components rather than complex fixed masks.
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
Enables a cost-effective, portable, and non-invasive means to simulate multifocal ophthalmic corrections, improving patient adaptation and selection of suitable lenses by providing a clear and accurate visual experience, reducing the need for multiple visits and potential suboptimal corrections.
Implementation Method 1
At least one of the channels travels through a Badal system, which introduces a different vergence (in the terminology of the multifocality, it is said that the Badal system introduces an addition)
Implementation Method 2
The instrument comprises two observation channels, one corresponding to distant vision and another for near vision, providing the eye different vergences (optical power)
Data Source
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AI summary
The invention relates to an instrument for simulation of multifocal ophthalmic corrections, comprising two optical channels with different optical power values in the beams coming from the object observed, wherein at least one channel comprises a Badal system. This instrument simultaneously provides images of objects near and far focused. The system provides the same optical magnifications for each channel, regardless of the optical power thereof, and produces superimposed retinal images with different degrees of focus which, unlike other devices, are all of the same size. The instrument allows simulating different optical powers for near vision and different refractive corrections for distant vision.