FOUR-AXIS ASYMMETRIC ORTHOKERATOLOGY LENS AND MANUFACTURING METHOD

Abstract

A four-axis asymmetric orthokeratology lens includes a base curve zone, and a reverse curve zone, an adaptation curve zone, and a peripheral curve zone that are successively formed outward from a periphery of the base curve zone. A center of a circle of the base curve zone corresponds to a center of a cornea, and a zone, corresponding to the adaptation curve zone, of the cornea is defined as a specific annular zone. According to the four-axis asymmetric orthokeratology lens, four meridional lines of a lens body are determined based on a mean sagittal depth in the specific annular zone on the cornea. The four meridional lines divide the adaptation curve zone of the lens body into the four sector ring zones, and different curvatures are specifically set for each meridional line, to relatively independently design curvatures for curved surfaces of the four sector ring zones.

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