Intraocular Lens Testing With Movable Optics for Visual Impressions
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Solution Overview
Problem
Existing methods for assessing visual impressions through intraocular lenses, such as computer simulations and optical test fixtures, fail to accurately predict a subject's subjective visual experience, particularly in myopic and hyperopic eyes, and cannot reliably simulate different visual situations like varying lighting conditions and viewing distances.
Innovation Solution
A vision testing system with a lens carrier holder that positions intraocular lenses along the central visual axis, capturing and assigning information about the visual impression, allowing subjects to experience real objects at near, intermediate, and far distances, and adjust for refractive errors using adjustable lenses, enabling qualitative selection of the most suitable intraocular lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If computer simulations are used to assess visual impressions, then the assessment can be performed, but the prediction of subjective visual experience is inaccurate
Solution Approach 1:
The patent uses real optical components (corneal optics, intraocular lenses, ocular optics) to create a physical copy of the eye's optical system. This optical bench replicates the actual optical path, allowing direct measurement of visual impressions rather than relying on computer simulations. The real optical components produce real light paths that can be objectively measured while still capturing subjective visual experience.
2Adaptability or versatility
If optical test fixtures are used to check visual impressions, then different visual situations can be simulated, but the simulation of varying lighting conditions and viewing distances is unreliable
Solution Approach 1:
The patent implements dynamic adjustment capabilities where the optical components can be moved along the optical axis to simulate different viewing distances. The system can dynamically change the position of the intraocular lens, corneal optics, and ocular optics to recreate various visual scenarios including near vision, intermediate vision, and distance vision, as well as different lighting conditions.
Solution Approach 2:
The system changes optical parameters such as the position of lenses along the optical axis, the refractive power of intraocular lenses, and the configuration of optical components to accurately simulate different visual situations. By adjusting these parameters, the system reliably reproduces varying lighting conditions and viewing distances.
3Adaptability or versatility
If adjustable lenses are used to correct refractive errors, then myopic and hyperopic eyes can be accommodated, but the device complexity increases
Solution Approach 1:
The patent designs the optical bench to serve multiple functions: it can test both myopic and hyperopic eyes, accommodate different intraocular lens types, and perform various visual acuity measurements. The same optical components and adjustable mechanisms handle multiple refractive error conditions, reducing the need for separate specialized devices for each condition.
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 accurate prediction of a subject's visual experience with intraocular lenses, correcting optical imaging issues in myopic and hyperopic eyes, and allowing for a realistic simulation of different visual scenarios, facilitating the selection of the best intraocular lens based on subjective assessment.
Implementation Method 1
The intraocular lens has different refractive powers: a primary refractive power and at least one supplementary refractive power equal to the primary refractive power, to which a differential refractive power is added. This lens structure allows the wearer to achieve sufficient vision at either a light-gathering point for distance vision, a light-gathering point for near vision, or a light-gathering point for intermediate vision
Implementation Method 2
Moving the corneal optics and the lens carrier receptacle with the intraocular lens along the central visual axis, with the ocular optics remaining at a fixed distance from at least one eye of the subject
Data Source
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AI summary
The invention relates to a method for checking at least one visual impression of a subject using a vision testing system, wherein the vision testing system comprises a lens carrier holder for receiving a lens carrier, which is mounted in a central viewing axis 21 of the optical beam path from distal to proximal successively between a corneal optic 40 and an ocular optic 45 and comprises at least the following steps: (a) positioning a first lens carrier with an intraocular lens in the lens carrier holder of the vision testing system; (b) displacing the corneal optic 40 and the lens carrier holder with the intraocular lens along the viewing axis 21, wherein the ocular optic 45 remains at a fixed distance from at least one eye of the subject; (c) detecting at least one piece of information indicative of the visual impression; (d) assigning the at least one piece of indicative information to the first intraocular lens.The invention further comprises vision testing systems and a lens carrier.