Experimental Investigations of Pupil Accommodation Factors
Experimental Investigations of Pupil Accommodation Factors
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DOI：
10.1167/iovs.10-6423
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发表时间：
2011-08-01
影响因子：
4.4
通讯作者：
Park, Kang Ryoung
中科院分区：
文献类型：
--
作者：
Lee, Eui Chul;Lee, Ji Woo;Park, Kang Ryoung
目的。控制进入视网膜的光量的虹膜肌肉的收缩和扩张导致瞳孔调节。本研究通过实验分析了影响瞳孔调节的三个因素中的两个：光照条件和深度注视。由于心理效益无法量化，因此未对其进行检验。一种基于头戴式眼镜的眼球捕捉装置被设计用来测量瞳孔大小。它包括一个近红外（NIR）相机和一个近红外发光二极管。24名被试观看相同内容的二维（2D）和三维（3D）立体视频，采用眼球捕捉装置和图像处理方法测量瞳孔大小的变化。瞳孔大小随着视频的强度和3D立体视频的左右图像之间的差异而变化。瞳孔大小与平均强度之间存在相关性。当光强在0 ~ 255之间变化时，瞳孔直径约从5.96 mm缩小到4.25 mm。此外，从瞳孔调节的固定深度的变化，证实了固定深度也影响瞳孔调节大小。研究证实，在观看3D立体视频时，照明条件对瞳孔调节的影响比深度固定更为显著（显著比约为3.2:1）。在现实世界中，瞳孔调节受深度固定的影响比三维立体显示中双眼收敛的影响更大。（Invest Ophthalmol Vis Sci. 2011; 52: 6478-6485） DOI: 10.1167/iovs.10-6423
PURPOSE. The contraction and dilation of the iris muscle that controls the amount of light entering the retina causes pupil accommodation. In this study, experiments were performed and two of the three factors that influence pupil accommodation were analyzed: lighting conditions and depth fixations. The psychological benefits were not examined, because they could not be quantified.METHODS. A head-wearable eyeglasses-based, eye-capturing device was designed to measure pupil size. It included a nearinfrared (NIR) camera and an NIR light-emitting diode. Twentyfour subjects watched two-dimensional (2D) and three-dimensional (3D) stereoscopic videos of the same content, and the changes in pupil size were measured by using the eye-capturing device and image-processing methods.RESULTS. The pupil size changed with the intensity of the videos and the disparities between the left and right images of a 3D stereoscopic video. There was correlation between the pupil size and average intensity. The pupil diameter could be estimated as being contracted from approximately 5.96 to 4.25 mm as the intensity varied from 0 to 255. Further, from the changes in the depth fixation for the pupil accommodation, it was confirmed that the depth fixation also affected accommodation of pupil size.CONCLUSIONS. It was confirmed that the lighting condition was an even more significant factor in pupil accommodation than was depth fixation (significance ratio: approximately 3.2: 1) when watching 3D stereoscopic video. Pupil accommodation was more affected by depth fixation in the real world than was the binocular convergence in the 3D stereoscopic display. (Invest Ophthalmol Vis Sci. 2011; 52: 6478-6485) DOI: 10.1167/iovs.10-6423