Patients whose visual acuity (VA) before surgery was< 6/60 in the better eye comprised 47% of the total case mix in poorly developed countries and 1% in developed countries (P < 0.001).
不发达国家中，手术前较好眼睛的视力低于6/60的患者占总病例组合的47%，而在发达国家中此比例仅为1%（P<0.001）。
Calculation results of city traffic parameters show that drivers visual perception lag time in the total reaction time cannot be ignored.
从城市交通具体参数计算结果表明，跟驰车辆驾驶员总反应时间中视觉感知滞后时间是不可忽视的。
The interface of multimedia assisted Chinese teaching, mainly means the total visual languages of bearing and transmitting information during the course of multimedia assisted Chinese teaching.
多媒体辅助语文教学的界面，主要是指运用多媒体辅助语文教学过程中，承载、传递教学信息的视觉语言的总和。
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