Abstract
By using psychological and physiological indicators, the effects on the body of three-dimensional (3D) movies containing improper settings were evaluated with 139 university students. The experiment consisted of two sessions: 1) a 3D movie containing improper 3D settings was compared with a 2D movie containing only the rightside images presented to both eyes, and 2) the original 3D movie was compared with the same 3D movie altered to contain improper 3D settings. The results of this experiment demonstrated clear deterioration of the subjective psychological indicators (degree of motion sickness after watching the movies and comfort level at 1-min intervals during the movie) with respect to the 3D movie containing improper settings. On the other hand, the physiological indicators (LF/HF ratio indicating the status of the autonomic nervous system) changed as a result of watching a 3D movie, but were unaffected by the presence or absence of improper 3D settings.
Highlights
The adoption of three-dimensional (3D) displays and 3D movies is spreading rapidly, and 3D images that previously could be viewed only with the aid of special devices and settings are becoming widely accessible
The results indicated that the status of the autonomic nervous system, as well as the subjective evaluation, exhibited characteristic changes while the participants watched 3D movies
The sickness questionnaire (SSQ) questionnaire consists of 18 questions distributed in four categories, where a specific weight is assigned to the raw score at the time of analysis [16]
Summary
The adoption of three-dimensional (3D) displays and 3D movies is spreading rapidly, and 3D images that previously could be viewed only with the aid of special devices and settings are becoming widely accessible. Based on interviews with this filmmaker, we learned that the causes of visual fatigue include excessive parallax, geometrical misalignment, and disparity in color or timing between the images presented to each eye. These causes coincide with past academic ergonomics research (introduced below). Regarding the movies for the experiment conducted in this study, first we ordered a 3D movie prepared with 3D settings regarded as “proper” based on the experience of the filmmaker (denoted as original3D) Another 3D movie was prepared by adding “improper” factors, considered to be related to visual fatigue, to the original 3D movie (denoted as altered3D), and a 2D movie (denoted as 2D) was prepared by presenting only the right-side images from the original 3D movie to both eyes
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