Portable Vision Testing Apparatus with Variable Lens Rail
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Solution Overview
Problem
In developing nations, there is a lack of access to healthcare systems, including optometry, resulting in uncorrected vision issues due to the absence of vision correction diagnosis and eyeglasses, making it difficult for people to perform daily tasks without corrective eyewear.
Innovation Solution
A portable, handheld vision testing apparatus with a frame, variable lens elements, and adjustable controls that allow for diopter corrections, enabling assessment and correction of visual acuity without electricity, suitable for use in various environments from Arctic to Amazon regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional vision testing equipment is used, then measurement precision is improved, but device complexity and portability are worsened
Solution Approach 1:
The vision testing apparatus is divided into separate functional components: a frame with temple arms, a face plate with eye shields, variable lens elements with outer rails, and adjustable controls. Each component performs a specific function, allowing the system to achieve precise measurement capabilities while maintaining modularity and portability.
Solution Approach 2:
Variable lens elements serve as intermediaries between the viewer and the visual acuity test target. These lenses with varying diopter powers allow precise measurement of visual acuity by enabling the user to find the optimal correction level, while the mechanical adjustment mechanism provides a simple interface for controlling the complex optical function.
2Ease of operation
If portable vision testing apparatus is used, then ease of operation in remote areas is improved, but measurement precision is worsened
Solution Approach 1:
The lens elements are designed to be dynamically adjustable rather than fixed. The adjustable controls allow the lens position to be changed along the outer rail, enabling real-time optimization of the optical path and measurement precision during use, while maintaining a compact portable form factor.
Solution Approach 2:
The apparatus utilizes variable lens elements with multiple regions of varying diopter power. By changing the optical parameter (diopter power) of the lens, the system can adapt to different visual acuity levels and provide accurate measurements across a range of conditions, all within a portable device.
3Adaptability or versatility
If variable lens elements with multiple diopter regions are used, then adaptability is improved, but device complexity is worsened
Solution Approach 1:
Multiple lens elements with different diopter powers are combined within a single adjustable assembly. The outer rail and adjustable control mechanism allow any of the multiple lens regions to be positioned in front of the viewing slot, effectively merging multiple optical functions into one integrated component that provides wide adaptability without requiring multiple separate devices.
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 apparatus allows for accurate diagnosis and correction of visual acuity, providing diopter settings for 20-20 vision, enabling individuals to perform daily tasks effectively and improving vision correction accessibility in remote areas.
Implementation Method 1
at least one variable lens element having an outer rail and multiple regions of varying diopter power
Data Source
AI summary
A vision testing apparatus has a frame including a face plate with at least one eye shield having a viewing slot positioned in a viewing direction perpendicular to the face plate, at least one variable lens element including an outer rail and multiple regions of varying diopter power having a width that is equal to or greater than the width of the viewing slot of the eye shield, and adjustable controls for moving the variable lens element in a direction perpendicularly to the viewing direction along a plane of the face plate. The testing apparatus is portable and can be used in developing nations where visual acuity is not corrected because of lack of access to optometric care.