Inductive Coil Sensor for Ocular Prosthesis Accommodation
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Solution Overview
Problem
Current vision correction technologies, such as intraocular lenses and contact lenses, face challenges in dynamically accommodating focus changes due to age-related eye geometry and tissue changes, leading to limited distance accommodation capacity and reliance on unreliable physiological mechanisms for signal generation.
Innovation Solution
A system employing mutually inductive coupled electromagnetic coil detectors with a dynamic reprogrammable algorithm to determine the desired degree of accommodation, integrated into ocular prostheses, allowing for consorted dynamic adaptation and improved accuracy over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed focus intraocular lens is implanted, then clearer vision postoperatively is achieved, but limited degree of accommodation (0.5 to 1.5 diopter) requires additional visual aids
Solution Approach 1:
The patent employs a tunable liquid crystal lens that can dynamically change its optical power from monofocal to multifocal states, allowing the intraocular lens to adapt its focusing capability based on viewing distance requirements, thereby restoring accommodation capacity while maintaining vision clarity
Solution Approach 2:
The patent changes the optical parameters of the intraocular lens by using liquid crystal material whose refractive index can be electrically controlled, enabling the lens to switch between different focal points and provide both distance and near vision without requiring additional visual aids
2Adaptability or versatility
If dual optic prostheses are implanted, then some accommodation is provided, but low optical power variability (2.5 diopters) limits effectiveness
Solution Approach 1:
The patent integrates multiple functions into a single prosthesis by combining monofocal and multifocal optical capabilities within one implant, allowing it to perform both distance and near vision correction without requiring separate dual optic devices, thereby reducing overall system complexity while maintaining accommodation capacity
3Ease of operation
If physiological mechanisms are used for signal generation, then accommodation control is achieved, but reliability is insufficient due to age-related changes
Solution Approach 1:
The patent replaces unreliable physiological mechanical mechanisms with an electronic control system that uses electromagnetic sensors to detect accommodation signals and electrically controls the liquid crystal lens, providing more reliable and consistent operation that is not affected by age-related physiological changes
4Measurement precision
If inductive coil sensor is used, then accurate accommodation signal detection is achieved, but device complexity increases
Solution Approach 1:
The patent combines the inductive coil sensor, power source, and control electronics into an integrated implantable unit that works synergistically with the tunable lens, reducing the need for separate external components and minimizing overall system complexity while maintaining high measurement precision for accommodation signals
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 system effectively generates accurate accommodation signals, reducing errors and enhancing the dynamic focus range of ocular prostheses, thereby improving vision correction capabilities.
Implementation Method 1
An inductive coil sensor, integrated into an ocular prosthesis such as a contact lens or intraocular lens implant, generates a magnetic field that varies with eye convergence angle
Implementation Method 2
the inductive coil sensor generates a magnetic field that varies with eye convergence angle, and which provides information about a desired optical power
Data Source
AI summary
An ocular adaptive lens prosthesis apparatus is provided. In some implementations the apparatus includes a tunable liquid crystal lens encapsulated in the ocular prosthesis with control electronics and a power source. The tunable liquid crystal lens is driven in response to a convergence signal to provide accommodation. In some embodiments the tunable liquid crystal device corrects other visual shortcomings of the natural eye. The ocular prosthesis has a remote programmable tunable liquid crystal lens controller configured to recalibrate the tunable liquid crystal lens to compensate for dynamic adaptation of the eye over time. A coil is employed to transmit a convergence signal between a pair of ocular prostheses in a dual eye vision correction system.