Adaptive Optics for Presbyopia Correction via Gaze-Dependent ADD Zones
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Solution Overview
Problem
Current methods for correcting presbyopia in contact lenses, such as bifocal lenses, face challenges in finding an optimal visual compromise between near and far vision, as they do not allow selection of the ADD zone based on gaze, and objective refraction tests often fail to correlate with subjective visual requirements.
Innovation Solution
An adaptive optics system that includes a wavefront sensor and adaptive optics hardware in a closed-loop configuration with a badal optometer, capable of providing aberration-corrected vision at multiple distances, allowing users to subjectively assess and objectively measure their vision, using MEMS devices or deformable mirrors to correct eye aberrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bifocal or simultaneous vision lenses are used to correct presbyopia, then both near and far vision defects are addressed, but the registration location of the contact lens on the cornea prevents selection of the ADD zone as a function of gaze, resulting in an inability to provide gaze-dependent vision correction
Solution Approach 1:
The patent implements a dynamic optical element (deformable mirror or liquid crystal display) that can change its optical properties in real-time based on detected gaze direction. This dynamic element is controlled by a processor that receives gaze information from sensors and adjusts the ADD zone position accordingly, enabling gaze-dependent vision correction while the physical lens remains stable on the cornea
Solution Approach 2:
The system incorporates feedback through gaze detection sensors that continuously monitor the user's eye position and send this information to a processor. The processor then adjusts the dynamic optical element to position the ADD zone according to the detected gaze direction, creating a closed-loop control system that adapts the lens functionality to the user's visual needs
2Productivity
If objective refraction tests are used to determine lens parameters, then automated measurement is achieved, but the tests do not correlate with subjective visual requirements, failing to capture the entire visual system's performance
Solution Approach 1:
The patent combines objective automated refraction testing with subjective visual acuity assessment in an integrated system. The processor coordinates both objective measurements (wavefront sensing, autorefractometry) and subjective tests (visual acuity charts, patient feedback) to comprehensively evaluate the visual system and determine optimal lens parameters that satisfy both automated measurements and patient-perceived visual quality
Solution Approach 2:
The system performs multiple functions within a single integrated platform: automated objective refraction, wavefront aberration measurement, visual acuity testing, and personalized lens design. This multi-functional system captures both the objective optical properties of the eye and the subjective visual experience, providing a comprehensive assessment that correlates with real-world visual performance
3Measurement precision
If high spatial frequency adaptive optic technology is implemented to correct eye aberrations, then measurement precision is improved, but device complexity increases due to the integration of wavefront sensors, adaptive optics hardware, and control systems
Solution Approach 1:
The patent introduces a processor as an intermediary that coordinates between the wavefront sensor, adaptive optics hardware, and lens design software. This central control unit processes the complex data from the wavefront sensor, calculates the required corrections, and controls the adaptive optical element, thereby managing system complexity while maintaining high measurement precision and correction effectiveness
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 the determination of optimal visual compromise for presbyopes by providing aberration-corrected images at various distances, improving the accuracy of lens design customization by combining subjective feedback with objective measurements.
Implementation Method 1
Wavefront sensors may also be used to detect refractive errors in the eye, such as for example, a Shack-Hartmann wavefront sensor. Measurements of the wavefront aberrations of the eye to a high degree of precision using an improved Hartmann-Shack wavefront sensor are described
Implementation Method 2
adaptive optics hardware that is in optical connection with the stimulus and the users eye that is also electrically connected to the wavefront sensor
Implementation Method 3
The adaptive optics hardware of the present invention may include may be selected from the group consisting of MEMS devices and deformable mirrors
Implementation Method 4
The adaptive optics hardware of the present invention may include may be selected from the group consisting of MEMS devices and deformable mirrors
Implementation Method 5
The present invention may also include a badal optometer, wherein the optometer provides distance compensation. In a related embodiment of the present invention, the badal optometer may resolve vision to at least three distances: far, intermediate, and near vision
Data Source
AI summary
An adaptive optics system that allows a user to see an aberration-corrected image. The system includes a stimulus that is in optical connection with a user's eyes, a wavefront sensor that is in optical connection with the user's eyes, binocular convergence compensating adaptive optics hardware that is in optical connection with the stimulus and the user's eyes and is also electrically connected to the wavefront sensor, and a badal optometer that is in optical connection with the stimulus and the user's eyes and is in optical connection with the wavefront sensor and the user's eyes.