[Orthokeratology in myopic children]

Orthokeratology is reversible clinical procedure which can reduce myopia using contact lenses made of high gas permeable material with 4 curves reverse geometry shape.

The aim of the paper is to evaluate vision acuity and progression of myo,ia and corneal curvature during use of overnight RGP lenses.

The studies have been peforrmed in 132 patients (264 eyes) in age 5 - 18 years (average 12.5 years) with myopia from -1.50 Dsph to -5.50 Dsph and astigmatism from 0.25 Dsph to 1.25 Dsph. In all patients cornea radius (automatic keratorefractometer) and coreal refractive power (coreat topography) was measured before and after 3 months of we- se ot aring during night RGP lenses. Refraction was measured with the use of autokeratorefraktometer after 2 to 6 years of wearing lenses.

In all patients reduction of corneal refractive power (on average 3.05 Dsph) and increase of corneal radiuses (on average 0.4 mm) has been observed. After 2 to 6 years of wearing during night RGP lenses refraction was the same in 48.5% of children, worsened in 31.8% of -0.50 Dsph and progressed of -1.00 Dsph in 19.7% of patients.

Orthokeratology reduces myopia due to temporary changes in corneal curvature. orthokeratology, myopia, corneal radius, corneal topography.