Optotype Presenting Apparatus Guide Parallax
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Solution Overview
Problem
Examinees, especially those not accustomed to stereoscopic vision tests, often struggle to see optotypes stereoscopically, leading to inefficient binocular vision testing due to difficulty understanding the test's meaning and fusing optotypes for left and right eyes independently.
Innovation Solution
An optotype presenting apparatus with a guide optotype that generates a parallax to help examinees see test optotypes stereoscopically, using a polarizing optical member and polarized glasses to split and present optotypes for each eye, and a control unit to manage the display of optotypes, including a frame optotype that appears to sink or float continuously or stepwise to guide the examinee's line of sight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stereoscopic vision test optotype is presented to examinees, then the test can evaluate binocular vision function, but examinees unaccustomed to stereoscopic vision tests cannot see the optotype stereoscopically
Solution Approach 1:
The patent applies preliminary action by presenting a guide optotype that generates a parallax before presenting the test optotype. This guide optotype helps examinees understand and adapt to the stereoscopic vision test concept in advance, making it easier for them to see the subsequent test optotype stereoscopically. The guide optotype serves as a preparatory step that bridges the gap between conventional 2D vision testing and stereoscopic 3D vision testing.
2Adaptability or versatility
If polarization method is used to present different optotypes to right and left eyes, then binocular vision test can be performed, but examinees have difficulty fusing optotypes independently
Solution Approach 1:
The patent uses the guide optotype as an intermediary element that mediates between the polarization-based stereoscopic presentation and the examinee's visual fusion capability. The guide optotype, which generates a visible parallax effect, serves as a visual cue that helps examinees understand how to fuse the polarized images for their right and left eyes, thereby facilitating the binocular fusion process.
3Ease of operation
If guide optotype generates large parallax to make floating or sinking obvious, then examinees can easily understand stereoscopic effect, but test precision may be affected
Solution Approach 1:
The patent applies local quality by making only the guide optotype generate a parallax, while the test optotype remains without parallax. This localized application of the parallax effect ensures that examinees can easily understand the stereoscopic effect through the guide optotype's obvious floating or sinking, while the test optotype maintains its precision for accurate stereoscopic vision measurement without being influenced by excessive parallax.
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 efficiently conducts stereoscopic vision tests by guiding examinees to see optotypes stereoscopically, improving test efficiency and understanding of the test's meaning, even for those unaccustomed to it.
Implementation Method 1
The optotype presenting apparatus presents (displays) various optotypes on a display such as a liquid crystal panel... by the use of polarization so that a binocular vision test such as a stereoscopic vision test can be performed
Implementation Method 2
the guide optotype generates a parallax so that the guide optotype is seen by the examinee as floating or sinking from the reference plane continuously or stepwise
Data Source
AI summary
An optotype presenting apparatus for presenting an optotype used to test a visual function of an examinee includes: an optotype presentation part configured to present the optotype in a predetermined presentation region; a control unit configured to allow a test optotype to be presented in the optotype presentation part, the test optotype including a stereoscopic vision test optotype that generates a parallax so as to be seen by the examinee as floating or sinking from a predetermined reference plane; and an optotype splitting unit configured to split the test optotype presented in the optotype presentation part into an optotype for a left eye and an optotype for a right eye to present the test optotype to right and left eyes of the examinee, wherein the test optotype includes a guide optotype for guiding the examinee to see the stereoscopic vision test optotype stereoscopically.