Contact lens and method of manufacturing the same

摘要

A contact lens (10) having a mark (34) on at least one of an anterior face (14) and a posterior face (16) thereof, wherein the improvement including: the mark (34) being defined by a concave annular section (38) having inside and outside peripheral borders of circular shape, and a center projection (36) situated in a center of the concave annular section (38); an outside diameter dimension of the concave annular section (38) is held within a range of 0.1-0.5mm; a widthwise center section of the concave annular section (38) in radial cross section is a flat section (42) having smaller depth change and greater radius of curvature than widthwise side sections; and at least the flat section (42) of the mark (34) has a rough surface. The method of manufacturing the contact lens (10) is also disclosed.