Inclusion Criteria:  Myopic eyes Preoperative corneal endothelial cell count ≥2200/mm2 Preoperative central anterior chamber depth> 2.80mm Intraocular pressure within the normal range (10-21mmHg)  Exclusion Criteria:  Severe dry eye Cataract and glaucoma Patients with uveitis Retinal detachment Patients with autoimmune diseases Patients with systemic diseases such as diabetes and hypertension Patients with mental or cognitive abnormalities