Effect of orthokeratology in patients with myopic regression after refractive surgery

Abstract Purpose To evaluate the clinical effect of orthokeratology (ortho-K) lenses and to introduce the fitting steps of ortho-K lens for myopic regression after keratorefractive surgery. Methods Twenty-one eyes from 12 patients with myopic regression after keratorefractive surgery were fitted with ortho-K lenses and followed up for 12.11±3.68 months. The mean K value of the peripheral cornea was used to speculate preoperative central corneal K value, estimated K . After dispensing the lenses according to estimated K , biomicroscopic examination including fluorescein staining and over-refraction were performed to determine the final K and final lens power. Results LogMAR uncorrected visual acuity was 0.48±0.39 before and 0.00±0.00 after wearing ortho-K lenses ( p p p K was 8.07±0.36mm, and final K used for ortho-K prescription was 8.19±0.30mm. Final K significantly correlated with K value of pre-fitted peripheral cornea ( r =0.737, p K ( r =0.721, p r =0.429, p =0.053). Conclusions Ortho-K lenses may be an effective solution for patients with myopic regression following keratorefractive surgery. Estimated K value can be used as reference value in ortho-K prescription.