Department of Ophthalmology, Kindai University Faculty of Medicine, Osakasayama City, Osaka, Japan.
PLoS One. 2019 Jan 17;14(1):e0210691. doi: 10.1371/journal.pone.0210691. eCollection 2019.
Using a head-mounted perimeter imo that can measure monocular sensitivity with both eyes open, we investigated the difference between monocular sensitivities measured with and without occlusion of the fellow eye and if the difference was influenced by eccentricity.
Using the perimeter imo, monocular sensitivities with/without occlusion and binocular sensitivity were measured and compared. Three test conditions for monocular sensitivity without occlusion were: with/without a fusional fixation target, and a binocular random single eye test in which the target was randomly presented to either eye and the examinee was not aware of the tested eye. Within the central 25° visual field (VF), 29 points located at the fovea and on the 45°, 135°, 225°, and 315° meridians with 3° intervals were tested. Differences among the four monocular sensitivities with/without occlusion were further evaluated at the fovea, within and beyond the central 5° VF.
Sixteen visually normal volunteers (mean age, 28.6 ± 4.6 years) were included in this study. Except at the fovea, monocular sensitivities measured without occlusion were significantly higher than those with occlusion (P < 0.01). No significant difference was seen among the three monocular sensitivities without occlusion (P = 0.82).
Except at the fovea, monocular sensitivities measured with and without occlusion significantly differed. This indicates that without occlusion, binocular interaction is activated and affects not only binocular sensitivity but also monocular sensitivity.
使用一种头戴式周边视野计，该视野计可以在双眼睁开的情况下测量单眼敏感性，我们研究了单眼敏感性在不遮盖和遮盖对侧眼时的差异，以及这种差异是否受离焦的影响。
使用周边视野计测量单眼敏感性（不遮盖和遮盖对侧眼）和双眼敏感性，并进行比较。在不遮盖对侧眼的情况下，单眼敏感性测试有三种条件：有/无融合性注视目标，以及双眼随机单眼测试，其中目标随机呈现给一只眼，受检者不知道测试的是哪只眼。在中央 25°视野（VF）内，测试了位于中央凹和 45°、135°、225°和 315°子午线上的 29 个点，间隔 3°。在中央 5°VF 内和之外，进一步评估了四种有/无遮盖的单眼敏感性之间的差异。
本研究纳入了 16 名视力正常的志愿者（平均年龄 28.6 ± 4.6 岁）。除中央凹外，不遮盖对侧眼时测量的单眼敏感性明显高于遮盖时（P < 0.01）。三种不遮盖对侧眼的单眼敏感性之间无显著差异（P = 0.82）。
除中央凹外，有/无遮盖的单眼敏感性差异显著。这表明，在不遮盖的情况下，双眼相互作用被激活，不仅影响双眼敏感性，还影响单眼敏感性。
