Matthew Bronstad P, Bowers Alex R, Albu Amanda, Goldstein Robert B, Peli Eli
J Clin Exp Ophthalmol. 2011 Dec 6;2011(Suppl 5):1.
Stroke frequently causes homonymous visual field loss. We previously found in a driving simulator that patients with complete homonymous hemianopia had difficulty detecting potential hazards on the side of the field loss. Here we measured the effects of limited paracentral homonymous field loss on detection performance.
Three patients with paracentral homonymous scotomas, yet meeting vision requirements for driving in the United States, performed a pedestrian detection task while driving in a simulator. Pedestrians appeared in a variety of potentially hazardous situations on both sides of the road. Three age- and gender-matched control participants with normal vision participated for comparison purposes.
Pedestrians appearing in the scotomatous side of the visual field were less likely to be detected, and when they were, reaction times were longer, frequently too late to respond safely.
Although legally permitted to drive in the U.S.A., and possibly in other countries, patients with paracentral homonymous field loss may have impaired hazard detection and may benefit from education about their deficit and a fitness-to-drive evaluation.
中风常导致同侧偏盲性视野缺损。我们之前在驾驶模拟器中发现，完全性同侧偏盲患者在视野缺损侧难以察觉潜在危险。在此，我们测量了局限性旁中心同侧视野缺损对检测性能的影响。
三名患有旁中心同侧暗点但符合美国驾驶视力要求的患者，在模拟器中驾驶时执行行人检测任务。行人出现在道路两侧各种潜在危险的情境中。三名年龄和性别匹配、视力正常的对照参与者参与实验以作比较。
出现在视野缺损侧的行人被检测到的可能性较小，即便被检测到，反应时间也更长，常常因反应过晚而无法安全应对。
尽管在美国以及其他国家可能在法律上允许驾驶，但患有旁中心同侧视野缺损的患者可能存在危险检测能力受损的情况，他们可能会从了解自身缺陷的教育以及驾驶适宜性评估中受益。
