Essential MF Calculator

A manufacturing process creates an S”-Form” posterior power gradient which compresses more effective ADD correction (up to +2.75D) within a usable optical area at the centre of the lens. This provides true aspheric optics with a continuous gradient of power that is truly optical from edge to edge. The usable ADD is contained along a shorter radius of the axial centre of the lens in a usable optical area. CSA (concentric ‘S’ form add) can be included on the anterior surface to optimise near vision

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