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，通过在搜索跟踪试验中自愿眼球运动的位移量获得的重叠注视模式来估计视野，作为视野检查的替代筛查医疗设备。通过青光眼患者对所提出的系统进行评价，以研究所提出的系统是否可以作为视野检测设备进行筛查。结果表明，该系统在一定程度上检测出了视野异常。然而，在某些情况下，对马里奥特盲点的检测是不准确的。实验结果表明，对于上睑下垂的影响，与视力重叠以及将显示位置校准到要检查的正确位置，我们有空间重新考虑我们的理解。评价实验结果表明，该系统具有作为视场检查设备的潜力。我们提出了一种利用眼球运动来确定视觉区域的视野检查方法。为了评价该系统在视野筛查中的适用性，我们比较了该系统和HFA对青光眼患者的视野检查结果。我们得到了以下结果。(1)可检出青光眼视野效应。(2)由于许多受试者在Mariotte盲点处有识别，我们认为眼睑抬高、测试方案、目标呈现方法等方面都有改进的空间。为了进一步改进，需要一种通过阈值试验准确估计青光眼视野缺损发育阶段的方法。青光眼的视野缺陷包括绝对暗斑，如在任何情况下都无法识别视觉目标的马里奥特盲点，以及相对暗斑，可以模糊地识别视觉目标。由于所提出的系统使用单一类型的视觉目标，因此无法区分绝对暗点和相对暗点。为了区分两种类型的暗斑，可以假设通过逐渐改变目标-背景亮度比来获得能见度数据，可以更详细地评估青光眼的视野缺陷；在这种情况下，该系统将更有助于青光眼治疗的随访。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