Analyse et comparaison de l’effet cornéen du traitement d’orthokératologie
Myopia is a growing visual problem everywhere on a world stage. High myopia is considered as a public health problem in some region of the world. To counter this trend, many strategies were developed to slow the myopia progression, including orthokeratology. Orthokeratology is a non-chirurgical method that mold the cornea to reshape it by flattening the central region and steepening the peripheral region in order to correct the distance vision and to create an image align or in front the peripheral retina. A retrospective analysis of the orthokeratology corneal optical effect was done on 64 comparative corneal topography for the two study groups (4 curves lens (Group A) and 5 curves (Group B) orthokeratology lenses). The addition power created in mid-peripheral corneal zone was similar between the two lens designs while the central distance zone diameter was different.  A strong correlation was found between the central distance zone diameter and the addition power created for the A lens. It provides evidence that the orthokeratology lens design difference created different central distance zone diameters which can affect clinical lens choice in the case of refractive correction and myopia control purposes.
vision sciences myopia corneal optics topography orthokeratology