PROGRESSIVE OPHTHALMIC SURFACE

摘要

The lens has a progressive ophthalmic surface comprising a main progression meridian that divides the surface into nasal and temporal portions and passes through a control point of coordinate at a mark centered at a reference point. The coordinate point is set inside a disk with 50 mm diameter centered on the reference point for the points located at coordinate to either side of the point to satisfy a specific relation. The relation includes parameters that are absolute value of maximum cylinder gradient of the points located at the coordinate in the nasal and temporal portions of the surface. Independent claims are also included for the following: (1) a method for determining a pair of progressive lenses (2) a method for obtaining ophthalmic equipment including a pair of progressive lenses.