The Accommodative Characteristics of Gazing at Stereoscopic Images on a 3-D Display
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Accession number;04A0081335
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| Title;The Accommodative Characteristics of Gazing at Stereoscopic Images on a 3-D Display |
| Author;
IWASAKI TSUNETO
(Univ. Occupational and Environmental Health, JPN)
TAHARA AKIHIKO
(Univ. Occupational and Environmental Health, JPN)
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Journal Title;Journal of Japanese Ophthalmological Society
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Journal Code:Z0666A
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ISSN:0029-0203
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VOL.108;NO.1;PAGE.5-11(2004)
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| Figure&Table&Reference;FIG.8, TBL.1, REF.18 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Purpose: We measured the accommodative response in order to investigate the influence of a visual function when gazing at stereoscopic images presented on a three dimensional display. Methods: Accommodative step responses were measured using an infrared optometer, setting the far target at the distance of 1 m and the near target at the distance of 50 cm. The step response of the right eye was examined 6 times at 10-second intervals. The far target was a starburst as a real image and the near target was a white circle on a random dot background on a parallax barrier system three-dimensional display as a stereoscopic image generated with a 90-min arc binocular crossed disparity (+1.5.DEG.) and a 90-min arc binocular uncrossed disparity (-1.5.DEG.), and a 0-min disparity(0.DEG.). The near target was presented in 4 ways:1)-1.5.DEG. disparity alone, 2)0-min disparity alone, 3)+1.5.DEG. disparity alone, and 4)+1.5.DEG. and -1.5.DEG. disparity alternately. Results In conditions 1)to3), the mean.+-.standard deviation values of the accommodative response were 0.59.+-.0.16D, 0.72.+-.0.11D, and 1.03.+-.0.21D, respectively. The accommodative response was very large at the disparity of+1.5.DEG. compared with the disparity of 0.DEG.(p=0.0300). It was not significant although there was a tendency to become small at the disparity of -1.5.DEG.(p=0.0707). In condition 4), the mean.+-.standard deviation values of the accommodative response were 0.62.+-.0.12D in the condition of -1.5.DEG. and 1.03.+-.0.26D in condition +1.5.DEG. with significant difference (p=0.0122). Conclusions: The over accommodation response is induced when gazing at a stereoscopic image under the condition of binocular crossed disparity. This indicates that gazing at stereoscopic images has ill effects on the accommodative system. (author abst.) |
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