A multicenter, randomized, double-blind, placebo-controlled clinical trial was designed. A total of 120 subjects were randomly assigned to two experimental groups (lowe-dose ZKY001 eye drops group,Medium-dose ZKY001 eye drops group) and a placebo control group, with 40 subjects in each group.

Study cycle: 7 days screening period (d-7-D-1), 7 days treatment period (D0-D6), and the end of the study on D7.

Statistical analysis was performed using SAS9.4 or above software. All statistical tests were two-sided, and P less than or equal to 0.05 was considered statistically significant for the difference being tested unless specified.

Inclusion Criteria:

1. Age of 18-40 years old, regardless of gender;
2. Plan TPRK for myopia and/or myopic astigmatism, meet the indications for TPRK, and set the ablation diameter of the optical zone at 6.0-6.5 mm;
3. Schirmer test I ≥10mm/5min;

Exclusion Criteria:

1. prior corneal refractive surgery or keratoplasty;
2. Contraindications to TPRK surgery, including severe ocular surface disease that may affect the corneal epithelium, active ocular inflammation, moderate to severe dry eye, keratoconus or other types of corneal ectasia, thin corneas, severe lesions of ocular appendages (such as eyelid defects, deformations, etc.), glaucoma, cataract that affects vision, History of systemic immune diseases (systemic lupus erythematosus, rheumatoid arthritis, multiple sclerosis, etc.);
3. incomplete eyelid closure;
4. corneal degeneration, corneal stroma or endothelial damage or malnutrition;