School of Optometry and Vision Science and the Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, Australia.
Ophthalmic Physiol Opt. 2019 Sep;39(5):350-357. doi: 10.1111/opo.12634. Epub 2019 Aug 4.
To investigate the effect of uncorrected astigmatism on night driving performance on a closed-road circuit.
Participants included 10 drivers (mean age 24.4 ± 7.0 years), with low to moderate bilateral astigmatism (0.75-1.50 DC), who were regular contact lens (CL) wearers. Vision and night driving performance were assessed in a cross-over design with a toric CL and a best-sphere spherical CL. Binocular visual function measures included photopic and mesopic visual acuity (VA), contrast sensitivity (CS), mesopic motion sensitivity and glare tests (Mesotest II and Halometer). Night-time driving performance was assessed on a closed-road circuit, which included measures of sign recognition, hazard detection and avoidance, pedestrian recognition distances, lane keeping, speed and overall driving score.
Correction of astigmatism with toric CL significantly improved mesopic VA, photopic and mesopic CS, mesopic motion sensitivity, and reduced glare (p < 0.05), compared to the spherical CL; there were no significant effects of visual correction type on photopic VA. Correction of astigmatism using toric CL resulted in significant improvements in night driving performance, compared to driving with spherical CL, particularly for sign recognition, avoidance of low contrast hazards, increased pedestrian recognition distances and overall driving score (p < 0.05).
Correction of low to moderate levels of astigmatism had significant positive effects on night-time driving performance and related tests of visual performance. This has important implications for optical corrections to improve night road safety of drivers with astigmatism.
研究未矫正的散光对封闭道路环路上夜间驾驶性能的影响。
参与者包括 10 名驾驶员（平均年龄 24.4±7.0 岁），具有低至中度的双眼散光（0.75-1.50 DC），且均为常规隐形眼镜（CL）佩戴者。采用交叉设计，用散光 CL 和最佳球性球面 CL 评估视力和夜间驾驶性能。双眼视觉功能测量包括明视和中视视力（VA）、对比敏感度（CS）、中视运动敏感度和眩光测试（Mesotest II 和 Halometer）。在封闭道路环路上评估夜间驾驶性能，包括标志识别、危险检测和避免、行人识别距离、车道保持、速度和整体驾驶评分。
与球面 CL 相比，散光矫正用散光 CL 显著提高了明视和中视 VA、明视和中视 CS、中视运动敏感度和降低了眩光（p<0.05）；但视觉矫正类型对明视 VA 无显著影响。与佩戴球面 CL 相比，散光矫正用散光 CL 显著提高了夜间驾驶性能，尤其是在标志识别、避免低对比度危险、增加行人识别距离和整体驾驶评分方面（p<0.05）。
矫正低至中度散光对夜间驾驶性能和相关视觉表现测试有显著的积极影响。这对改善散光驾驶员夜间道路安全的光学矫正具有重要意义。
