Continuous nursing intervention was performed on the basis of the control group

discharge guidance was performed according to routine nursing intervention at the time of discharge, and the patients were informed to return to the hospital for regular review (review was performed at 1 month, 3 months, half a year, 1 year, and 2 years after discharge, respectively).

Intervention group: Continuous nursing intervention was performed on the basis of the control group: ①A continuous nursing intervention group was established. The group members included chief physician, attending physician, head nurse, specialist nurse and nutritionist. ②The establishment of patient records, patients admitted to hospital by the primary nurse to record the basic situation of patients, including name, age, history of diabetes, DR staging, vision and blood glucose before treatment and other information. ③Personalized nursing intervention was given during hospitalization. Systematic health education was carried out for patients on admission. Targeted psychological counseling was given to some patients. ④After discharge to give continuous care, organize patients to join the WeChat group, group to share knowledge of DR-related diseases, to understand the patient 's medication, diet, vision, the patient 's questions and problems to guide and improve.

Each item was scored according to three levels of 10 points, 6 points and 2 points, with a total score of 20-100 points. The higher the score, the higher the nursing satisfaction

The translated Chinese version of the SDSCA scale consists of 11 items, reflecting five parts of self-management : diet, exercise, blood glucose monitoring, foot care, and drugs. Each item is scored by 8 levels of 0-7 points, of which 1 item is a reverse question. The purpose of this scale is to measure the self-management behavior of patients within 7 days. The total score is 0~77 points. The higher the score, the better the self-management ability. Above 56 points is good for self-management ability, 42~56 points is medium, and below 42 points is poor.

1. Significant improvement: visual acuity improvement≥4 lines.
2. improvement: vision improvement≥2 lines.
3. unchanged: visual acuity increased by 1 line or decreased by 1 line.
4. decline: visual decline≥2 lines.