目的：分析新型冠状病毒肺炎疫情期间实时面对面线上教学(以“腾讯会议”教学为例)在医学教育中的利弊及其与医学生眼表疾病的相关性，为改进线上教育方案、预防干眼提供依据。方法：以中南大学湘雅医学院本科学生为研究对象，采用横断面研究的方法，使用问卷星收集数据，研究实时面对面线上教学的效果及对眼表疾病的影响。结果：共收集到131份有效数据，绝大多数学生(84.73%)认为实时面对面线上教学是有效的，96.18%的学生认为实时面对面线上教学达到或部分达到了学习的目的，但是实时面对面线上教学的师生互动与课堂氛围有待加强，另外网络设备问题也是实时面对面线上教学需要面对的问题。同时，调查显示实时面对面线上教学参与学生的干眼患病率达66.41%，家庭所在地、家庭人均月收入、使用设备、是否全程专注听课与干眼患病率之间无相关性。结论：新型冠状病毒疫情期间实时面对面线上教学在医学教育中是有效的，但是师生互动不足、课堂氛围不够活跃、网络连接不稳定是其主要问题。此外，实时面对面线上教学会增加干眼的发病率，需要提高护眼意识，积极预防。

Objective: To analyze the advantages and disadvantages of real-time face-to-face online teaching (taking “Tencent Conference” teaching as an example) in medical education and its correlation with ocular surface diseases during the COVID-19 pandemic, and to provide basis for improving online education programs and preventing dry eye. Methods: The undergraduate students of Xiangya School of Medicine of Central South University were selected as the research objects. The method of cross-sectional study was used to collect data using questionnaires to study the effect of real-time face-to-face online teaching and its impact on ocular surface diseases. Results: A total of 131 valid data were collected. Among them, the vast majority of students (84.73%) think real time face to face online teaching is effective, and 96.18% of the students believe that real-time face-to-face online teaching at least partly achieved the purpose of learning. However, the interaction between teachers and students and the classroom atmosphere of real-time face-to-face online teaching needs to be strengthened. In addition, network equipment is also a problem that real-time face-to-face online teaching needs to face. Meanwhile, the survey showed that the prevalence rate of dry eye among the students who participated in real-time face-to-face online teaching reached 66.41%, and there was no correlation between the incidence rate of dry eye and the location of family, the per capita monthly income of family, the equipment, and whether they paid full attention to the lectures. Conclusion: Real-time face-to-face online teaching is effective in medical education during COVID-19, but the main problems are insufficient teacher-student interaction, inactive classroom atmosphere and unstable Internet connection. In addition, real-time face-to face online teaching will increase the incidence of dry eye, so it is necessary to improve the awareness of eye protection and actively prevent it.