Comparison of monocular sensitivities measured with and without occlusion using the head-mounted perimeter imo
Comparison of monocular sensitivities measured with and without occlusion using the head-mounted perimeter imo
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DOI：
10.1371/journal.pone.0210691
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发表时间：
2019-01-17
期刊：
影响因子：
3.7
通讯作者：
Shimomura, Yoshikazu
中科院分区：
文献类型：
--
作者：
Wakayama, Akemi;Matsumoto, Chota;Shimomura, Yoshikazu
目的使用可在双眼睁开的情况下测量单眼敏感度的头戴式视野计imo，研究在对侧眼遮挡和不遮挡情况下测量的单眼敏感度之间的差异，以及该差异是否受到偏心率的影响。方法使用视野计imo，测量并比较有/无遮挡情况下的单眼敏感度和双眼敏感度。无遮挡情况下单眼敏感性的三种测试条件是：有/无融合固定目标，以及双眼随机单眼测试，其中目标随机呈现给任意一只眼睛，并且被检查者不知道被测试的眼睛。在中央25度视野（VF）内，测试位于中央凹和45度、135度、225度和315度经线上间隔3度的29个点。在中央凹、中央 5 度 VF 之内和之外，进一步评估有/没有闭塞的四种单眼敏感性之间的差异。结果 本研究包括 16 名视力正常的志愿者（平均年龄，28.6 +/- 4.6 岁）。除中央凹外，无遮挡时测得的单眼灵敏度显着高于遮挡时的单眼灵敏度（P < 0.01）。无遮挡情况下三种单眼灵敏度之间无显着差异（P = 0.82）。结论除中央凹外，有遮挡和无遮挡情况下测量的单眼灵敏度存在显着差异。这表明，在没有遮挡的情况下，双眼相互作用被激活，不仅影响双眼敏感性，而且影响单眼敏感性。
PurposeUsing 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.MethodsUsing 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 degrees visual field (VF), 29 points located at the fovea and on the 45 degrees, 135 degrees, 225 degrees, and 315 degrees meridians with 3 degrees intervals were tested. Differences among the four monocular sensitivities with/without occlusion were further evaluated at the fovea, within and beyond the central 5 degrees VF.ResultsSixteen 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).ConclusionsExcept 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.