Evaluation of Indicators of the Optical System and Hydrodynamics of Eyes With Myopia in the Treatment of Orthokeratological Lenses

Purpose. To study the features of changes in the parameters of the optical system and hydrodynamics of eyes with myopia during treatment with orthokeratological lenses. 80 patients (160 eyes) with mild myopia were examined — 30 patients (60 eyes) and 50 patients (100 eyes) with moderate myopia before and after treatment with orthokeratological lenses. Research methods. Visometry, autorefractometry, ophthalmometry, biometry, keratotopography, determination of accommodation indicators (AOA, ZOA) and hydrodynamics of the eyes. Results: It was revealed after the use of orthokeratological lenses in the night mode, a significant decrease in the true vg d (Po) and an increase in the coefficient of ease of outflow (C) with the activation of accommodation indicators — AOA and ZOA, contributing to a decrease in the degree of myopia and an increase in uncorrected visual acuity. Conclusion: One of the factors of the effectiveness of the treatment of myopia with orthokeratological lenses are the indicators of the hydrodynamics of the eyes and the strengthening of the functions of the accommodation apparatus — an increase in AOA and ZOA.