Yonsei Med J.  2014 Nov;55(6):1672-1677. 10.3349/ymj.2014.55.6.1672.

Real Stereopsis Test Using a Three-Dimensional Display with Tridef Software

• Han J
• Han SY
• Lee SK
• Lee JB
• Han SH

• KMID: 2070218
• DOI: http://doi.org/10.3349/ymj.2014.55.6.1672

Abstract

PURPOSE
To investigate horizontal image disparity in three-dimensional (3-D) perception using 3-D animations in normal control patients and patients with intermittent exotropia, anisometropic amblyopia, and partially accommodative esotropia.
MATERIALS AND METHODS
A total of 133 subjects were included. Stereopsis was measured using the Titmus Stereo test (Stereo Optical Inc., Chicago, IL, USA) and a 3-D stereopsis test with a 15 inch 3-D display laptop, adjusting 3-D parameters of 0 mm horizontal disparity to 15 mm horizontal disparity.
RESULTS
When compared with normal controls, the average threshold of the 3-D stereopsis test was significantly reduced for esotropia patients (p<0.001) and for anisometric amblyopia patients (p<0.001), compared to normal controls. No significant difference was observed between normal controls and intermittent exotropia patients (p=0.082). The 3-D stereopsis test was correlated with the Titmus Stereo test (Spearman's rho=0.690, p<0.001). Mean difference in stereoacuity was 1.323 log seconds of arc (95% limits of agreement: 0.486 to 2.112), and 125 (92.5%) patients were within the limits of agreement.
CONCLUSION
This study demonstrated that a 3-D stereopsis test with animation is highly correlated with the Titmus Stereo test; nevertheless, 3-D stereopsis with animations generates more image disparities than the conventional Titmus Stereo test. The 3-D stereopsis test is highly predictive for estimating real stereopsis in a 3-D movie theater.

Keyword

Depth perceptions; vision disparity; imaging; three dimensional

MeSH Terms

Adult
Aged
Amblyopia/diagnosis
Anisometropia/diagnosis
*Depth Perception
Esotropia/diagnosis
Female
Humans
Imaging, Three-Dimensional/*instrumentation
Male
Middle Aged
*Perceptual Disorders
Software
*Vision Disparity
Vision, Binocular
Visual Acuity/*physiology

Figure

• 

  Fig. 1 (A) Subject watches the 3-dimensional (3-D) movie displayed by a 15 inch 3-D laptop computer. (B) The video clip was converted into a 3-D movie by a TriDef 3-D media player.

• 

  Fig. 2 Box plot illustrating the results of the Titmus Stereo and three-dimensional (3-D) stereopsis tests for each group of patients. *Statistical significance compared to normal controls. arcsec, seconds of arc.

• 

  Fig. 3 Scatter plot showing the association between the Titmus Stereo and three-dimensional (3-D) stereopsis tests (Spearman's rho=0.690, p<0.001). arcsec, seconds of arc.

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  Fig. 4 Bland-Altman plot showing differences between the three-dimensional (3-D) stereopsis and Titmus Stereo tests for 133 subjects. Gray area shows 95% limits of agreement with 95% confidence intervals. Mean difference between the 3-D stereopsis and Titmus tests was 1.323 log arcsec. arcsec, seconds of arc.

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