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用对数标准视力表检查了四铁地区6所中小学1615名学生的视力。同时还对视力低下率较高的一所小学测定了教室的采光系数与桌面照度。结果:中学生平均视力低下率为31.95％,明显较小学(24.60％)高,差异有显著性意义
The visual acuity of 1615 students in 6 primary and secondary schools in the Quadrangle area was examined using a logarithmic standard eye chart. At the same time, a primary school with a high rate of visual impairment measured the lighting factor and desktop illumination of the classroom. Results: The average visual acuity rate of middle school students was 31.95%, which was significantly smaller (24.60%). The difference was significant.