Portable Vision Testing Optics for Instant Visual Acuity Checks

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Solution Overview

Problem

Existing vision testing methods require fixed locations, are inconvenient to carry, and do not allow easy and instant monitoring of changing visual acuity levels, necessitating costly and time-consuming visits to professional institutions.

Innovation Solution

A portable vision test apparatus with converging and diverging lenses, integrated with a display device, capable of generating and processing optotypes of varying sizes to assess visual acuity levels, and a method for image compensation to accommodate different display resolutions, allowing instant visual acuity assessments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If professional vision testing equipment is used at inspection institutions, then measurement precision is improved, but loss of time and loss of money increase

Engineering Contradiction:

Improvevisual acuity measurement precisionVSAvoidtime for vision testing

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent creates a portable copy of professional vision testing equipment by integrating optometric lenses, optotype displays, and measurement functions into a handheld device that can be used anywhere, eliminating the need to travel to inspection institutions while maintaining measurement capabilities

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces the mechanical/optical system of traditional vision testing with an electronic display system that presents optotypes through a screen, combined with digital imaging capture and automated analysis, substituting complex optical mechanisms with electronic alternatives

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If professional vision testing equipment is used at inspection institutions, then measurement precision is improved, but loss of money increases

Engineering Contradiction:

Improvevisual acuity measurement precisionVSAvoidtesting costs

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent uses inexpensive components such as standard optical lenses, off-the-shelf display screens, and consumer-grade image sensors to create a low-cost vision testing device that eliminates the need for expensive professional equipment while providing sufficient measurement accuracy

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent integrates multiple functions into a single portable device including optotype display, image capture, automated analysis, and result presentation, eliminating the need for separate professional equipment and reducing overall testing costs

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If traditional vision testing methods are used, then measurement precision is maintained, but ease of operation worsens due to fixed location requirements

Engineering Contradiction:

Improvevisual acuity measurement precisionVSAvoidconvenience of vision testing

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent transforms the static, fixed-location vision testing system into a dynamic, portable system that can be moved and used in various locations, allowing users to test their vision at home or on the go while maintaining measurement accuracy through integrated optical and electronic components

Inventive Principle:

Principle #15Dynamics

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 convenient, portable visual acuity testing without the need for fixed locations, reducing costs and time, and providing real-time monitoring of visual acuity changes.

Implementation Method 1

The diverging lens demagnifies the test optotype to form a first virtual image within the converging focal length

Methodology Applied

Scientific EffectLens demagnification: Lens

Implementation Method 2

The converging lens magnifies the first virtual image to form a second virtual image for a vision testing

Methodology Applied

Scientific EffectLens magnification: Lens

Data Source

PatentUS12588807B2Vision test apparatus, method and system and non-transient computer readable recording medium

Publication Date: 2026.03.31 EYEMIKAN BIOTECH INC

AI summary

A vision test apparatus includes a hollow housing, a converging lens, and a diverging lens. The converging lens is arranged in the hollow housing, and includes a converging focal length. The diverging lens is arranged in the hollow housing at intervals relative to the converging lens, and includes a diverging focal length. Two optical axes of the diverging lens and the converging lens are overlap each other, and the diverging focal length partially overlaps the converging focal length. One end of the hollow housing adjacent to the diverging lens attaches a test optotype displayed by a display apparatus. The diverging lens demagnifies the test optotype to form a first virtual image within the converging focal length. The converging lens magnifies the first virtual image to form a second virtual image for a vision testing.