Clinical performance of computer-aided fitting of orthokeratology lens in Chinese children

Objective : To determine the clinical performance, after 1-month lens wear, of fitting of orthokeratology (ortho-k) lenses with the aid of a computer software. Method : Chinese myopic children, aged between 8 and 12 years with myopic spherical refractive error between − 4.00 D and − 0.75 D and refractive astigmatism within 1.50 D, were recruited. Lenses were fitted with the aid of a computer software (EyeLite, Procornea, Netherlands). Data analysed included lens performance, myopic reduction, visual acuity, corneal topography, and ocular health. The criteria for successful fit included residual myopia not exceeding − 0.50 D at the 1-month visit, unaided visual acuity (UVA) not worse than 0.1 LogMAR in either eye, lens centration not exceeding 1 mm (all directions), and no significant adverse corneal complications. Results : A total of 82 cases were included in the analysis. Initial mean cycloplegic spherical equivalent refraction (SER) was − 1.80 ± 0.69 D. At the 1-month visit, the first fit success rate was 91.5%. UVA was logMAR − 0.03 ± 0.10, with only mild corneal staining observed: central (4.9%), peripheral (25.6%). Lens imprint (mild) was observed in 2.4% of participants. Conclusion : A high first-fit success rate was achieved using the EyeLite software to assist lens fitting. Myopia was satisfactorily reduced, resulting in good and stable vision without any significant ocular adverse events. Clinical trial : This study was registered on the Chinese Clinical Trial Registry (Registration number ChiCTR2300072008), date of registration 31 May, 2023.