Measurement for field of vision with unrestrained head for the application of physiological anthropology

本研究介绍了一种新的技术，用于估计视野，通过使用重叠的固定模式获得的位移量在自愿的眼球运动在搜索跟踪试验，作为一种替代的筛选医疗设备的视野检查。建议的系统进行了评估，青光眼患者，以研究是否建议的系统可以作为一个视野检测设备用于筛选。结果，所提出的系统在一定程度上检测到视野异常。然而，在某些情况下，马略特盲点的检测不准确。实验结果表明，有空间重新考虑我们的理解，上睑下垂的影响，重叠与眼睛的视力，以及校准的显示位置，以正确的位置进行检查。评估实验的结果表明，该系统有潜力被用作视野检查设备 ...更多信息 用于筛选。我们提出了一种利用随意眼动来确定视区的视野检查方法。为了评估所提出的系统的视野筛查的适用性，我们比较了所提出的系统和HFA获得的青光眼患者的视野检查的结果。我们得到了以下结果。(1)可以检测到青光眼视野效应。(2)由于许多受试者在Mariotte盲点中具有识别能力，因此我们得出结论，眼睑抬高、测试方案、目标呈现方法有改进的空间。为了进一步完善，需要一种通过阈值测试来准确估计昏迷性视野缺损的发展阶段的方法。青光眼性视野缺损包括那些被称为绝对暗点的视野缺损，例如在任何情况下都不能识别视觉目标的马略特盲点，以及那些被称为相对暗点的视野缺损，其中视觉目标可以模糊地识别。由于所提出的系统使用单一类型的视觉目标，绝对暗点不能从相对暗点区分。对于两种类型的暗点之间的区分，可以假设可以通过逐渐改变目标-背景亮度比以获取可见度数据来实现对青光眼视野缺陷的更详细的评估;在这种情况下，所提出的系统对于青光眼治疗中的随访将更有用。少

This study introduces a novel technique for estimating visual field by using overlapped fixation patterns obtained by amounts of displacement in voluntary eye movements during searching-tracking trials, as an alternative screening medical device for visual field examination. Proposed system was evaluated by glaucoma patients, in order to study whether or not the proposed system can be used as a visual field detection device for screening. As a result, the proposed system detected the visual field abnormality to a certain extent. However, there were some cases that detection of Mariotte blind spots was inaccurately performed. The experimental results revealed that there was room to reconsider our understanding regarding the effect of ptosis, overlapped with eye sight as well as calibration of the display position to the correct location to be examined. Results of the evaluation experiment indicated that this proposed system has a potential to be used as a visual field examination device … More for screening. We have proposed a visual field examination method using voluntary eye movement to determine the visual area. In order to evaluate the applicability of the proposed system to visual field screening, we compared the results of visual field examination of glaucoma patients obtained by the proposed system and by HFA. We obtained the following results. (1) Glaucomatous visual field effects can be detected. (2) Since many subjects had recognition in the Mariotte blind spot, we concluded that there is room for improvement regarding eyelid elevation, the test protocol, the target presentation method. For further improvement, a method is needed to accurately estimate the developmental stages of glaucomatous visual field defects by means of threshold tests. Glaucomatous visual field defects include those called absolute scotomata, such as the Mariotte blind spot, in which visual targets cannot be recognized in any case, and those called relative scotomata, in which visual targets can be recognized vaguely. Since the proposed system uses visual targets of a single kind, absolute scotomata cannot be distinguished from relative scotomata. For differentiation between the two types of scotomata, one can assume that more detailed evaluation of glaucomatous visual field defects can be achieved by gradual variation of the target-background luminance ratio to acquire visibility data ; in this case, the proposed system would be more useful for follow-up in glaucoma treatment. Less