Evaluating the Mechanism by Which the TNO Stereo Test Overestimates Stereo Thresholds

Autor:	Yu Zhang, Huang Wu, Bingbing Meng
Rok vydání:	2021
Předmět:	Article Subject Wilcoxon signed-rank test business.industry 05 social sciences RE1-994 Luminance Grayscale 050105 experimental psychology Stereoscopic acuity 03 medical and health sciences Ophthalmology 0302 clinical medicine Stereopsis Friedman test 030221 ophthalmology & optometry Optometry Medicine 0501 psychology and cognitive sciences Phoropter business Anaglyph 3D Research Article
Zdroj:	Journal of Ophthalmology Journal of Ophthalmology, Vol 2021 (2021)
ISSN:	2090-0058 2090-004X
Popis:	Several studies have revealed that results of the TNO stereo test may overestimate the stereoacuity value (the less the better) compared with other testing measurements. The manner in which vision is divided among two eyes of a person wearing anaglyph glasses may play an important role. This study aimed to examine the effect of anaglyph glasses on stereopsis measurements. A stereopsis measurement system using a phoropter and two Sony smartphones was established. Four types of test patterns, including the original TNO stereo test pictures, isoluminant red-green pictures, grayscale pictures, and black and white dots pictures, were designed. A total of 32 participants were recruited for this study. A significant difference was found among the four groups (Friedman test, chi-square = 50.985, P < 0.001 ). The Wilcoxon signed-rank test was used to detect differences between the groups. The stereoacuity of the original TNO group was significantly worse than those of the isoluminant, grayscale, and black-white groups. However, no significant difference was found between the isoluminant and grayscale groups. The correlation coefficient between the original TNO and isoluminant groups was 0.952 (Spearman’s rho, P < 0.001 ; 95% confidence interval (CI), 0.901–0.988), while that between the original and grayscale groups was 0.771 (Spearman’s rho, P < 0.001 ; 95% CI, 0.550–0.916). Anaglyph glasses played an important role in determining the stereoacuity values with the TNO stereo test, and the results were overestimated when compared with that of the other testing methods. The imbalance of chroma and luminance between the two eyes caused by the anaglyph glasses was indicated as one of the reasons for the overestimation of stereo thresholds.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d21cd5ed59bb8694d1fb03e0fe4d85f https://doi.org/10.1155/2021/6665638 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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