Development of a quantitative perimeter screening system for young children based on an immersive VR display
✍ Scribed by Mikio Suga; Yoshito Tabata; Satoru Nagata; Kotaro Minato; Kunihiro Chihara
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 971 KB
- Volume
- 89
- Category
- Article
- ISSN
- 8756-663X
No coin nor oath required. For personal study only.
✦ Synopsis
The visual field and the visual acuity are representative functions of vision. Visual field inspection is performed by quantitative visual field examination in which the change in the visual field is observed while varying the size and the brightness of the presented target. At present, visual field inspection, which is usually performed in ophthalmology, is a subjective examination in which the subject gazing at a fixation point to the front answers whether a target presented at the periphery is seen. However, it is difficult for young children and the elderly to continue gazing at the fixation point due to difficulty in understanding the instructions and in maintaining concentration. This makes it difficult to measure the visual field quantitatively using the existing perimeter. The purpose of this study is to achieve quantitative visual field screening of young children. A system was developed in which the major components are an immersive display device, a camera for view line detection, and a video to interest the child. The proposed system does not require instruction or the autonomous answers from the subject and can examine the visual field in an environment close to that of daily life. Visual field measurements were performed with healthy adult subjects using the proposed system, and it was verified by comparison with the results of measurement by the existing perimeter that the proposed system is reliable as a screening system. An experiment was also performed with child subjects, and it was shown that the proposed system can quantitatively screen the visual field of young children.