Four-Light-Path Vision Detection for Stable Teen Eye Measurement
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Solution Overview
Problem
Existing vision detection technologies struggle to accurately and cost-effectively measure ocular axial length and refractive error in teenagers with weak fixation capability, and fail to synchronously collect anterior and posterior segment images, leading to high device costs and reduced practical value in myopia detection.
Innovation Solution
A vision detection apparatus and method combining four light paths: ocular axial length measurement, diopter detection, optotype, and eye position monitoring, using a low-cost design with movable prisms and spectrometers to enable stable gaze and precise image collection, reducing the need for light path switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time domain optical coherence tomography with Hartmann wavefront detection technology is used to perform synchronous measurement on refractive error and ocular axial length, then joint detection capability is achieved, but the device cannot effectively determine ocular diopters and ocular axial length for teenagers with weak fixation capability and the device manufacturing cost is high
Solution Approach 1:
The patent divides the vision detection system into four independent light paths (ocular axial length measurement, diopter detection, optotype, and eye position monitoring), each optimized for its specific function. This segmentation allows each path to be independently adjusted and optimized, particularly benefiting teenagers with weak fixation capability by providing dedicated fixation images through the optotype light path while maintaining accurate measurement capabilities in other paths.
Solution Approach 2:
The patent employs a common eye lens that serves all four light paths, making it a multi-functional component. This universal eye lens reduces the overall device complexity and manufacturing cost while maintaining the specialized capabilities of each light path through independent optical component design.
2Adaptability or versatility
If time domain optical coherence tomography with Hartmann wavefront detection technology is used to perform synchronous measurement on refractive error and ocular axial length, then joint detection capability is achieved, but the device manufacturing cost is high
Solution Approach 1:
The patent divides the vision detection system into four independent light paths (ocular axial length measurement, diopter detection, optotype, and eye position monitoring), each optimized for its specific function. This segmentation allows each path to be independently adjusted and optimized, particularly benefiting teenagers with weak fixation capability by providing dedicated fixation images through the optotype light path while maintaining accurate measurement capabilities in other paths.
Solution Approach 2:
The patent employs a common eye lens that serves all four light paths, making it a multi-functional component. This universal eye lens reduces the overall device complexity and manufacturing cost while maintaining the specialized capabilities of each light path through independent optical component design.
3Adaptability or versatility
If light path switching using vibrating lens is used to measure anterior segment and posterior segment, then measurement capability is achieved, but the difficulty in adjustment of light path consistency increases and costs increase
Solution Approach 1:
The patent divides the vision detection system into four independent light paths (ocular axial length measurement, diopter detection, optotype, and eye position monitoring), each optimized for its specific function. This segmentation allows each path to be independently adjusted and optimized, particularly benefiting teenagers with weak fixation capability by providing dedicated fixation images through the optotype light path while maintaining accurate measurement capabilities in other paths.
Solution Approach 2:
The patent uses a movable prism component with motorized control to dynamically adjust the ocular axial length measurement light path, replacing the need for vibrating lens-based switching. This dynamic adjustment mechanism simplifies light path consistency maintenance while preserving comprehensive measurement capabilities across all segments.
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 determination of ocular diopter and axial length with reduced costs, suitable for children and teenagers, and enhances myopia detection accuracy by stabilizing gaze and simplifying light path adjustments.
Implementation Method 1
a first spectroscope, disposed on a propagation path of a transmission light generated by the fundus information collection light transmitted through the light splitter to reflect the transmission light generated by the fundus information collection light through the light splitter and the reflective light generated by the cornea information collection light using the light splitter to form an ocular axis information collection light emitted
Implementation Method 2
a measurement signal receiving module, disposed on a propagation path of the transmission light generated by the ocular axis information reflective light through the first spectroscope to receive interference information of the transmission light generated by the ocular axis information reflective light through the first spectroscope
Data Source
AI summary
A vision detection apparatus is provided which comprises an eye lens, and the followings which are juxtaposed, with the eye lens as a common component: an ocular axial length measurement light path for measuring an ocular axial length of a detected eye; a diopter detection light path for obtaining refractive error information of the tested eye; an optotype light path for providing a fixation image for the detected eye 1 and enabling the detected eye to gaze stably; an eye position monitoring light path for performing three-dimensional positioning for the detected eye and collect imaging information of the detected eye. Through the present disclosure, it is possible to obtain information on refractive errors in the eyes, measure the anterior and posterior segment regions, and obtain eye parameters such as axial length, which has high practical value in vision detection of the teenagers.