Deffler Rebecca A, Frazee Elise, Cooley San-San L, Dougherty Bradley E
The Ohio State University College of Optometry, Columbus, Ohio, USA.
Ophthalmic Physiol Opt. 2025 Jul;45(5):1186-1194. doi: 10.1111/opo.13496. Epub 2025 Mar 27.
Some individuals with central vision impairment can obtain or maintain driving privileges using bioptic telescopes. Previous work has often demonstrated an increased collision risk for bioptic drivers, but some on-road studies find similar safety to that of normally sighted drivers. The purpose of this study was to compare exposure-controlled hard braking and speeding events measured with naturalistic recording in visually impaired bioptic drivers and normally sighted control drivers.
Visual acuity was measured for each eye individually and through the bioptic when indicated. Contrast sensitivity was measured binocularly with the Mars chart. Binocular integrated visual fields were constructed from monocular 24-2C SITA Faster plots. A commercially available GPS recorder was installed into drivers' personal vehicles for at least 6 weeks. Total mileage, instances of hard braking, travel over 65 miles per hour (mph) and posted speed limit violations were counted. Exposure-controlled rates were calculated for each of these safety events. Driver characteristics and hard braking events were compared using median tests, and Spearman correlation was used to assess the relationships among vision measurements and driving safety events.
Twenty licensed bioptic drivers and 20 control drivers were enrolled. Bioptic drivers were significantly more likely to perform hard braking manoeuvres than controls. Among bioptic drivers, hard braking frequency was not predicted by visual acuity, contrast sensitivity or binocular integrated visual field deviation. Bioptic drivers with poorer contrast sensitivity were more likely to travel above 65 mph. Speeding events were not related to hard braking.
Bioptic drivers demonstrated nearly three times as many hard braking events per 1000 miles driven, but vision measurements did not predict hard braking. Bioptic drivers with poorer contrast sensitivity were more likely to drive faster than 65 mph. Further work exploring relationships among vision and driving safety in bioptic drivers is warranted.
一些中心视力受损的个体可使用助视望远镜获得或维持驾驶特权。以往的研究常常表明助视器驾驶者的碰撞风险增加，但一些道路研究发现其安全性与视力正常的驾驶者相似。本研究的目的是比较在视力受损的助视器驾驶者和视力正常的对照驾驶者中，通过自然istic记录测量的暴露控制下的急刹车和超速事件。
分别测量每只眼睛的视力，并在需要时通过助视器测量。使用火星图表双眼测量对比敏感度。双眼综合视野由单眼24-2C SITA Faster图构建。将一个商用GPS记录仪安装到驾驶者的个人车辆中至少6周。计算总里程、急刹车次数、每小时超过65英里（mph）的行驶里程以及违反张贴限速的次数。计算这些安全事件中每一项的暴露控制率。使用中位数检验比较驾驶者特征和急刹车事件，并使用Spearman相关性评估视力测量与驾驶安全事件之间的关系。
招募了20名持照助视器驾驶者和20名对照驾驶者。助视器驾驶者比对照者更有可能进行急刹车操作。在助视器驾驶者中，急刹车频率不能通过视力、对比敏感度或双眼综合视野偏差来预测。对比敏感度较差的助视器驾驶者更有可能以超过65 mph的速度行驶。超速事件与急刹车无关。
助视器驾驶者每行驶1000英里的急刹车事件几乎是对照者的三倍，但视力测量不能预测急刹车。对比敏感度较差的助视器驾驶者更有可能以超过65 mph的速度驾驶。有必要进一步研究助视器驾驶者视力与驾驶安全之间的关系。
