Compare the Clinical Efficacy of 3% Diquafosol and 0.1% Hyaluronic Acid in Patients with Dry Eye After Trans-PRK

Inclusion Criteria: * Age 18-40 years. * The refractive status should be maintained at least for more than 2 years, during which the annual increase in myopia should be controlled within 0.50 D. * Pherical equivalent (SE) ≤-6.00D, astigmatic power≤-2.00D. * Best corrected vision before surgery≥1.0. * Patients should stop wearing soft contact lenses for at least 2 weeks and hard contact lenses for at least 4 weeks before surgery. Postoperative corneal stromal thickness was preserved (280 μm). Exclusion Criteria: * Suspected of having keratoconus, a definite diagnosis of keratoconus, or another type of corneal dilatation disease. * There is active inflammation or symptoms of infection in the eye. * The thickness of the cornea does not meet the preset cutting depth requirement: the thickness of the central cornea should be greater than 450 μm, and the thickness of the central corneal stroma remaining under the corneal flap should be maintained above 250 μm after the intended cutting (280 μm recommended). * Dry eye. * There are serious lesions in the accessory structures of the eye, such as defects or deformations of the eyelids. * People with uncontrolled systemic connective tissue diseases and autoimmune diseases, such as systemic lupus erythematosus and rheumatoid arthritis.