Students often use excessive eye, a vision-fatigue, conjunctivitis and visual fatigue will increase the mutual promotion and symptoms, also seriously affect visual quality and learning efficiency.

• 中小学生经常过度用眼，易出现视力疲劳、结膜炎和视力疲劳会相互促进而加重症状，严重者还影响视觉质量和学习效率。