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KMID : 1011420120170020185
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Journal of Korean Ophthalmic Optics Society
2012 Volume.17 No. 2 p.185 ~ p.194
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Change of Phoria and Subjective Symptoms after Watching 2D and 3D Image
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Kim Dong-Su
Lee Wook-Jin
Kim Jae-Do
Yu Dong-Sik
Jeong Eui-Tae
Son Jeong-Sik
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Abstract
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Purpose: The changes of phoria and subjective asthenopia before and after viewing were compared based on 2D
image and two ways of 3D images, and presented for references of 3D image watching and production.
Methods: Change in phoria was measured before and after watching 2D image, 3D-FPR and 3D-SG images for
30 minutes with a target of 41 university students at 20-30 years old (male 26, female 15). Paired t-test and Pearson correlation between changed phoria and subjective symptoms which were measured using questionnaires were evaluated by before and after watching each images.
Results: Right after watching 2D image, exophoria was increased by 0.5 Δ? in distance and near, but it was not a significant level. Right after watching 3D image, exophoria was increased by 1.0~1.5 Δ? and 1.5~2.0 Δ? in distance and near, respectively when compared with before watching. In the significant level, exophoria tended to increase. Changes in near was increased more by 0.5 Δ? compared with those in distance. Changes based on way of 3D-FPR and 3D-SG image were less than 0.5 Δ? and there was almost no difference. In terms of visual subjective symptoms, eye strain was increased in 3D image compared with that in 2D image. In addition, there was no difference depending on way of image. In
terms of Pearson correlation between phoria change and eye strain, as exophoria was increased, eye strain was
increased.
Conclusions: Watching 3D image increased eye strain compared with watching 2D image, and accordingly exophoria tended to increase.
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KEYWORD
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2D image, 3D image, 3D-FPR, 3D-SG, Asthenopia, Phoria, Binocular vision
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