Inclusion Criteria:

1. Age ≥ 18 years old;
2. Stable refractive index (refractive index change less than 0.5D in the past 2 years);
3. The best corrected far vision (CDVA) is 1.0 or better;
4. Postoperative dry eye patients need to meet the following criteria: Patient's Eye Surface Disease Index (OSDI) ≥ 13 and two of the following three criteria are met: Tear film rupture time (BUT) ≤ 10S Schirmer I test (mm/5min) ≤ 10mm, corneal fluorescein sodium staining exceeding 5 spots;

Exclusion Criteria:

1. History of eye trauma or surgery;
2. Suspected keratoconus;
3. Previously suffering from other eye diseases such as keratitis or edema, glaucoma, uveitis, retinal detachment, macular degeneration, cataracts, amblyopia, etc.;
4. Preoperative history of severe dry eye disease;
5. Patients with systemic diseases, such as hyperthyroidism or autoimmune diseases; Or severe mental disorders, such as anxiety and depression;