Société de l'Assurance Automobile du Québec, Services aux usagers de la route, Quebec, Canada.
Traffic Inj Prev. 2011 Oct;12(5):483-90. doi: 10.1080/15389588.2011.582906.
In Quebec a driver whose acquired visual field defect renders them ineligible for a driver's permit renewal may request an exemption from the visual field standard by demonstrating safe driving despite the defect. For safety reasons it was decided to attempt to identify predictors of failure on the road test in order to avoid placing driving evaluators in potentially dangerous situations when evaluating drivers with visual field defects.
During a 4-month period in 2009 all requests for exemptions from the visual field standard were collected and analyzed. All available medical and visual field data were collated for 103 individuals, of whom 91 successfully completed the evaluation process and obtained a waiver.
The collated data included age, sex, type of visual field defect, visual field characteristics, and concomitant medical problems. No single factor, or combination of factors, could predict failure of the road test. All 5 failures of the road test had cognitive problems but 6 of the successful drivers also had known cognitive problems. Thus, cognitive problems influence the risk of failure but do not predict certain failure.
Most of the applicants for an exemption were able to complete the evaluation process successfully, thereby demonstrating safe driving despite their handicap. Consequently, jurisdictions that have visual field standards for their driving permit should implement procedures to evaluate drivers with visual field defects that render them unable to meet the standard but who wish to continue driving.
在魁北克，如果驾驶员因获得性视野缺陷而不符合驾驶执照更新的条件，可以通过证明尽管存在缺陷仍能安全驾驶来请求豁免视野标准。出于安全原因，我们决定尝试确定道路测试失败的预测因素，以避免在评估有视野缺陷的驾驶员时使驾驶评估员处于潜在危险的情况。
在 2009 年的 4 个月期间，收集并分析了所有豁免视野标准的请求。为 103 名个体整理了所有可用的医疗和视野数据，其中 91 名个体成功完成了评估过程并获得了豁免。
整理的数据包括年龄、性别、视野缺陷类型、视野特征和伴随的医疗问题。没有单一因素或多种因素可以预测道路测试的失败。所有 5 次道路测试失败都有认知问题，但 6 名成功的驾驶员也有已知的认知问题。因此，认知问题会影响失败的风险，但不能预测某些失败。
大多数申请豁免的人都能够成功完成评估过程，从而证明尽管存在残疾，他们仍能安全驾驶。因此，有驾驶执照视野标准的司法管辖区应实施程序来评估因视野缺陷而无法达到标准但仍希望继续驾驶的驾驶员。
