Light Field Vision Testing Device for Dynamic Visual Acuity Assessment
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Solution Overview
Problem
Existing vision testing methods, such as those using phoropters, rely on subjective feedback and require corrective eyewear for accurate visual acuity assessment, which can be cumbersome and inefficient.
Innovation Solution
A light field vision testing device that dynamically adjusts user perception of an input image by using an array of digital display pixels and light field shaping elements, allowing for precise vision correction and optimal visual acuity identification without the need for corrective eyewear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional phoropter with corrective eyewear is used for vision testing, then visual acuity assessment accuracy is maintained, but device complexity and ease of operation deteriorate due to cumbersome setup and subjective feedback requirements
Solution Approach 1:
The patent replaces the mechanical phoropter system with a light field display system that uses computational optics and software-based image rendering to achieve vision correction and testing, eliminating the need for physical corrective lenses and complex mechanical adjustments
Solution Approach 2:
The patent creates a virtual copy of the corrected visual experience by rendering images through light field shaping elements that simulate the effect of corrective eyewear, allowing vision testing without actual corrective lenses
2Measurement precision
If traditional phoropter with corrective eyewear is used for vision testing, then visual acuity assessment accuracy is maintained, but ease of operation deteriorates due to subjective feedback requirements
Solution Approach 1:
The light field display system automatically adjusts the light field parameters and image rendering based on the user's visual characteristics, reducing the need for continuous subjective feedback and practitioner intervention while maintaining assessment accuracy
Solution Approach 2:
The system incorporates automated feedback mechanisms that track user responses and dynamically adjust the light field parameters, reducing reliance on manual subjective feedback while maintaining measurement precision
3Ease of operation
If light field shaping elements are used to dynamically adjust user perception, then ease of operation improves by eliminating corrective eyewear, but device complexity increases due to array of pixels and light field shaping elements
Solution Approach 1:
The patent merges the display function and vision correction function into a single integrated light field display system, where the same array of pixels and light field shaping elements perform both image display and optical correction, rather than requiring separate corrective lenses and display devices
Solution Approach 2:
The light field display system serves multiple functions simultaneously: it displays visual test content, performs vision correction, and enables vision testing, replacing what traditionally required separate corrective eyewear and testing equipment
4Productivity
If light field shaping elements are used to dynamically adjust user perception, then productivity improves by enabling efficient vision testing, but device complexity increases due to adjusted pixel rendering requirements
Solution Approach 1:
The system performs preliminary calculations and adjustments of the light field parameters and image rendering in advance, based on the user's visual characteristics, enabling rapid vision testing without requiring complex real-time adjustments during the testing process
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 device enables accurate and efficient vision testing by dynamically adjusting image rendering to accommodate various visual acuity levels, allowing for precise identification of optimal visual acuity and potential vision correction needs.
Implementation Method 1
a corresponding array of light field shaping elements (LFSEs) shaping a light field emanating from said pixels
Implementation Method 2
an adjustable refractive optical system, interposed between said array of pixels and said user pupil location so to set a selectable coarse refractive correction and thus further refract and thus redirect said light field emanated by each said given pixel
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3C
AI summary
Described are various embodiments of a light field vision testing device, adjusted pixel rendering method and computer-readable medium therefor, and vision testing system and method using same. In one embodiment, a device or computer-implemented method is provided to dynamically adjust user perception of an input image to be rendered via a set of digital display pixels and a corresponding array of light field shaping elements until an optimal visual acuity level is identified.