Wydanie 2/2005

Wpływ ortokorekcji na zmiany grubości i krzywizny rogówki

Othokeratology Influence Upon Central Corneal Thickness and Corneal Curvature

Ewa Oleszczyńska-Prost

Centrum Okulistyki Dziecięcej w Warszawie
Kierownik: dr n. med. Ewa Oleszczyńska-Prost

Summary: Orthokeratology is a reversible clinical procedure to reduce myopia using contact lenses which are made of high gas permeable material with 4 curves reverse geometry shape.
Purpose: The aim of the paper was to evaluate the central corneal thickness and radiuses of corneal curvature during ortholenses use.
Material and methods: The studies have been performed in 16 patients (32 eyes) aged 10-16 years (average 12.5 years) with myopia from -1.5 D to -5.0 D and astigmatism from 0.25 D to 1.25 D. In all patients central corneal thickness (ultrasonic pachymetry), corneal radius (automatic keratorefractometer) and corneal refractive power (corneal topography) was examined before and after 3 months of ortholenses wear.
Results: In all patients reduction of corneal refractive power (on average 3.05 D) and increase in corneal radiuses (on average 0.4 mm) has been observed. Central corneal thickness has diminished (on average 10 µm).
Conclusion: Orthokeratology reduces myopia due to changes in corneal curvature which is accompanied by the reduction in central corneal thickness.

Keywords: orthokeratology, myopia, central corneal thickness, corneal radius, corneal topography.


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