Effects of Orthokeratology in Patients With Convergence Insufficiency Exophoria and Myopia

Purpose To observe and analyze the effects of orthokeratology in patients with convergence insufficiency, exophoria, and myopia. Methods Thirty patients (60 eyes) between 8 and 15 years old with myopia and convergence insufficiency exophoria treated with orthokeratology at the First Affiliated Hospital of the Baotou Medical College from December 2022 to December 2023 were prospectively enrolled. General information was gathered and examinations were performed at baseline and at 2 weeks and 1, 3, and 6 months after switching to orthokeratology lenses. Examinations included assessments of distance/near visual acuity, near point of convergence, distance and near horizontal phoria, near positive fusional vergence, and monocular amplitude of accommodation. Results The median age of the participants was 10 years (range: 8 to 15 years), and 40% were female. The baseline refractive error was −2.00 diopters (D) (range: −4.00 and −1.00 D). After 6 months of treatment, we found statistically significant differences in near point of convergence (95% confidence interval: −13.99 to −8.67), positive fusional vergence (95% confidence interval: 15.32 to 11.42), and monocular amplitude of accommodation (95% confidence interval: 6.62 to 4.51) compared with baseline. In addition, the mean pretreatment near horizontal phoria decreased from 6.83 ± 1.44 to −4.90 ± 1.29 prism diopters after the 6 months of treatment (95% confidence interval: −2.92 to −0.94). Conclusions This study showed that the use of orthokeratology lenses with an increased compression factor of 1.75 D may improve near point of convergence, positive fusional vergence, and monocular amplitude of accommodation for the treatment of convergence insufficiency with myopia. [ J Pediatr Ophthalmol Strabismus . 20XX;X(X):XXX–XXX.]