Myopic progression in association with orthokeratological correction according to the optical biometry data

The purpose of the study is to analyse myopic progression in association with orthokeratological (OK) correction. Material and Methods. We studied medical histories of 416 patients (832 eyes) with mild, average and high myopia in association with OK correction. Apart from routine ophthalmic examination, all patients underwent optical biometry on the IOL-Master (Carl Zeiss) device before OK lens fitting and every year of wearing the lens (maximum 5 years). Treatment results of patients with visual acuity 0.9-1.0 and 0.7-0.8 in association with OK correction were compared separately. Results. We noted an increase in the axial length of the eye (АРА) in the majority of patients. Significant differences of the annual gradient of myopic progression were revealed: it was significantly lower in patients with visual acuity 0.9-1.0 in association with OK correction in comparison with patients with hypocorrection and visual acuity 0.7-0.8. Conclusion. In cases when OK lenses are fitted to slow down myopic progression, it is necessary to achieve full myopic correction and maximum visual acuity (0.9-1.0).