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首页> 外文期刊>Investigative ophthalmology & visual science >Effects of Different Levels of Refractive Blur on Nighttime Pedestrian Visibility
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Effects of Different Levels of Refractive Blur on Nighttime Pedestrian Visibility

机译：不同水平的折射模糊对夜间行人可见度的影响

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Purpose: The aim of this study was to systematically investigate the effect of different levels of refractive blur and driver age on nighttime pedestrian recognition and determine whether clothing that has been shown to improve pedestrian conspicuity is robust to the effects of blur. Methods: Nighttime pedestrian recognition was measured for 24 visually normal participants (12 younger mean = 24.9 ?± 4.5 years and 12 older adults mean = 77.6 ?± 5.7 years) for three levels of binocular blur (+0.50 diopter [D], +1.00 D, +2.00 D) compared with baseline (optimal refractive correction). Pedestrians walked in place on a closed road circuit and wore one of three clothing conditions: everyday clothing, a retro-reflective vest, and retro-reflective tape positioned on the extremities in a configuration that conveyed biological motion (known as a??biomotiona??); the order of conditions was randomized among participants. Pedestrian recognition distances were recorded for each blur and pedestrian clothing combination while participants drove an instrumented vehicle around a closed road course. Results: The recognition distances for pedestrians were significantly reduced (P 0.05) by all levels of blur compared with baseline. Pedestrians wearing biomotion clothing were recognized at significantly longer distances than for the other clothing configurations in all blur conditions. However, these effects were smaller for the older adults, who had much shorter recognition distances for all conditions tested. Conclusions: In summary, even small amounts of blur had a significant detrimental effect on nighttime pedestrian recognition. Biomotion retro-reflective clothing was effective, even under moderately degraded visibility conditions, for both young and older drivers.
机译：目的：本研究的目的是系统地研究不同程度的屈光模糊和驾驶员年龄对夜间行人识别的影响，并确定已显示出改善行人醒目的服装是否对模糊影响有抵抗力。方法：在24个视觉正常参与者（12个年轻平均值= 24.9±4.5岁，12个成年人平均值= 77.6±±5.7岁）的三个水平的双眼模糊（+0.50屈光度[D]，+ 1.00）下，对夜间行人识别进行了测量。 D，+ 2.00 D）与基线相比（最佳屈光矫正）。行人在封闭的道路上走到位，穿着以下三种衣服之一：日常穿着的衣服，反光背心和反光带，它们以传递生物运动的方式放置在四肢上（称为“ biomotiona”）。 ？）;条件的顺序在参与者之间是随机的。记录每个模糊和行人服装组合的行人识别距离，同时参与者在封闭的道路上驾驶仪表车。结果：与基线相比，所有模糊程度均明显降低了行人的识别距离（P <0.05）。在所有模糊条件下，与其他服装相比，穿着生物运动服装的行人的距离明显更长。但是，对于老年人而言，这些影响较小，在所有测试条件下，老年人的识别距离要短得多。结论：总之，即使少量的模糊也会对夜间行人识别产生重大不利影响。即使在适度降低的能见度条件下，Biomotion逆向反射服装对于年轻人和年长的驾驶员也是有效的。

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