Clinical Research Directory

Inclusion Criteria: 1. Aged 18-45 years ; 2. Myopia, with or without astigmatism, annual diopter change ≤ 0.50 D for 2 consecutive years ; 3. Anterior chamber depth ≥ 2.80 mm ; 4. Corneal endothelial cell count ≥ 2000 / mm2, stable cell morphology ; 5. There were no other ocular diseases that significantly affected vision and / or systemic organic lesions that affected surgical recovery. Exclusion Criteria: 1. There were no other ocular diseases that significantly affected vision and / or systemic organic lesions that affected surgical recovery; 2. Have a history of corneal refractive surgery or intraocular surgery ; 3. Corneal endothelial cell count is low ; 4. Those with systemic diseases ; 5. Lactating or pregnant women.