The worse eye revisited: Evaluating the impact of asymmetric peripheral vision loss on everyday function
The worse eye revisited: Evaluating the impact of asymmetric peripheral vision loss on everyday function
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DOI：
10.1016/j.visres.2019.10.012
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发表时间：
2020-04-01
期刊：
影响因子：
1.8
通讯作者：
Jones, Pete R.
中科院分区：
文献类型：
--
作者：
Chow-Wing-Bom, Hugo;Dekker, Tessa M.;Jones, Pete R.
在不对称周边视力丧失的情况下（例如，青光眼），在简单心理物理任务上的双眼表现（例如，静态阈值视野检查法）仅由视力较好的眼睛很好地预测。这表明，周边视觉在很大程度上是“更好的眼睛有限”。在本研究中，我们研究这是否也适用于现实世界的任务，或者即使是退化的同伴眼睛是否也能为日常生活任务提供重要信息。12名视力正常的成年人在虚拟现实的家庭环境中进行日常视觉引导动作（寻找移动的手机），而每只眼睛的周边视力丧失水平（凝视相关模糊）则独立控制。结果表明，即使较好眼睛的视力保持不变，参与者定位目标的速度也明显较慢，并且头部和眼睛的运动明显更多，因为较差眼睛的周边视力丧失增加。单纯单侧周边损害使反应时间增加25%，尽管双侧视力丧失的影响更大（> 200%）。这些发现表明，即使是退化的视野仍然为执行日常视觉引导的行动提供重要信息。这可能对如何管理或优先考虑视野丧失患者以及我们如何理解周边双眼信息的整合具有临床意义。
In instances of asymmetric peripheral vision loss (e.g., glaucoma), binocular performance on simple psychophysical tasks (e.g., static threshold perimetry) is well-predicted by the better seeing eye alone. This suggests that peripheral vision is largely 'better-eye limited'. In the present study, we examine whether this also holds true for real-world tasks, or whether even a degraded fellow eye contributes important information for tasks of daily living. Twelve normally-sighted adults performed an everyday visually-guided action (finding a mobile phone) in a virtual-reality domestic environment, while levels of peripheral vision loss were independently manipulated in each eye (gaze-contingent blur). The results showed that even when vision in the better eye was held constant, participants were significantly slower to locate the target, and made significantly more head- and eye-movements, as peripheral vision loss in the worse eye increased. A purely unilateral peripheral impairment increased response times by up to 25%, although the effect of bilateral vision loss was much greater ( > 200%). These findings indicate that even a degraded visual field still contributes important information for performing everyday visually-guided actions. This may have clinical implications for how patients with visual field loss are managed or prioritized, and for our understanding of how binocular information in the periphery is integrated.