Abstract: Objective To investigate the impact of students' reading and writing habits on their vision,in order to provide scientific basis for making more targeted visual protection measures.Methods A total of 2 081 students were selected from 5 schools in Tianjin by stratified cluster random sampling.The visual examination and questionnaires were carried out for them.Univariate and multivariate logistic regression were used to analyze the effects of the reading and writing habits.Results The overall prevalence of poor vision among the 2 081 students was 53.96%,and the prevalence of severe poor vision was 23.79%.The prevalence of poor vision for boys and girls was 50.18% and 58.07%,respectively,and the difference was statistically significant(x2=13.81,P<0.01).Multivariate Logistic regression analysis found that reading and writing when the distance from the desk is a punch was the protective factors of poor vision (OR=0.751).Keeping eyes too close to the books(less than 20 cm) (OR=1.575),reading the book under the direct sunlight (OR=1.531),spending long time on reading and writing (such as 2 to 3 h) (OR=2.549),and playing electronic products on the bus (OR=1.726) were risk factors of poor vision(P<0.05).Conclusion The reading and writing habits of primary and secondary school students can have an impact on their visual status.Schools and parents should help students to develop good habits of writing and reading in daily life.