关键词: 教室, 照明, 学生, 视力不良

Abstract: Objective To analyze the effect of the improvement of classroom lighting environment on vision of elementary school students,so as to improve the eyesight health and control poor eyesight among children and adolescents. Methods In March 2017,a total of 291 students from 12 classes of grade 4 of a primary school in Beijing were selected by cluster random sampling,and the standard logarithmic visual acuity chart (5 m) was used to detect the visual acuity of students.6 intervention and 6 control classes were selected.The lights of the intervention classrooms were transformed,and the lights of the control classrooms were unchanged.The effects of different lighting conditions on students′ vision were analyzed by t tests and χ² tests. Results After the transformation of classroom lighting,the illumination of the desks and blackboard had been improved(301.79 lx vs. 547 lx; 329.89 lx vs 603.18 lx),and the differences were statistically significant(P<0.001).The visual acuity of students decreased after 4 months,but students in the improved the lighting environment had less visual loss (-0.02±0.15 vs. -0.06±0.18,t=-2.122,P=0.035),and fewer students′ eyesight was getting worse(13.29% vs. 22.30%,χ²=4.023,P=0.045). Conclusion Changes in classroom lighting can affect fourth-graders′ vision and the improvement of the classroom light environment can delay the decline of students′ poor vision.

Key words: classroom, lighting, student, poor vision