The Different Design of Orthokeratology

Inclusion Criteria: The age is greater than 8 years and less than 18 years The myopia was within -4.00D (including -4.00D), and the astigmatism was within 1.50D (including 1.50D) in both eyes. Be able to complete 12 months of follow-up They were able to understand the purpose of the trial, volunteered to participate, and signed informed consent by the subjects themselves or their legal guardians Exclusion Criteria: One eye met the inclusion criteria Patients with systemic diseases causing immunocompromised or affecting orthokeratology There are other eye diseases that affect orthokeratology lens wearing, such as dacryocystitis, blepharitis, various inflammation, glaucoma, etc Abnormal cornea Previous corneal surgery or corneal trauma history Active keratitis (e.g., corneal infection) Patients with best corrected distance visual acuity of less than 5.0 Patients with corneal flat curvature lower than 39.00D, or higher than 48.00D Patients with refractive instability Patients with overt strabismus The corneal epithelium showed obvious fluorescent staining, which was not suitable for patients wearing orthokeratology lenses Patients with dry eye are not suitable for orthokeratology Patients with corneal endothelial cell density less than 2000 cells /mm2 Patients who had worn rigid contact lenses (including orthokeratology lenses) within the previous 30 days