Shibuki Katsuei, Yokota Tsuyoshi, Hirasawa Akane, Tamura Daisuke, Hasegawa Shin, Nakajima Takashi
Department of Clinical Laboratory, Kashiwazaki General Hospital and Medical Center, Kashiwazaki, Japan.
Brain Research Institute, Niigata University, Asahi-Machi, Chuo-Ku, Niigata, Japan.
Front Neurol. 2021 Jun 2;12:682761. doi: 10.3389/fneur.2021.682761. eCollection 2021.
Gaze control is required for applying visual stimuli to a particular area of the visual field. We developed a visual field test with gaze check tasks to investigate hemianopia. In this test, participants must report the presence or absence of visual stimuli when a small object at the fixation point vibrates. Trials in the absence of visual stimuli were used as gaze check tasks, since the vibration could be observed only when the gaze was directed at the fixation point. We evaluated the efficacy of our test in four control participants and one patient with homonymous hemianopia who was unaware of the defects in the left visual field. This patient presented hemianopia in the test with gaze check tasks, but not when the gaze check tasks were omitted. The patient showed spontaneous gaze movements from the fixation point to the upper left direction, as well as scanning of the left visual field during the test without gaze check tasks. Thus, we concluded that the visual defects in this patient were compensated in daily life by spontaneous eye movements coordinated with visual information processing. The present results show the usefulness of the visual field test with gaze check tasks.
为了将视觉刺激应用于视野的特定区域，需要进行注视控制。我们开发了一种带有注视检查任务的视野测试，以研究偏盲。在该测试中，当注视点处的小物体振动时，参与者必须报告视觉刺激的有无。没有视觉刺激的试验用作注视检查任务，因为只有当注视指向注视点时才能观察到振动。我们在四名对照参与者和一名患有同侧偏盲且未意识到左视野缺陷的患者中评估了我们测试的有效性。该患者在带有注视检查任务的测试中出现偏盲，但在省略注视检查任务时则没有。在没有注视检查任务的测试过程中，该患者表现出从注视点到左上方的自发注视运动，以及对左视野的扫视。因此，我们得出结论，该患者的视觉缺陷在日常生活中通过与视觉信息处理相协调的自发眼球运动得到了补偿。目前的结果表明了带有注视检查任务的视野测试的有用性。
