Patent ID: 8104891

Claim:
A protective shield for mounting in front of a face of a wearer in an as worn orientation, with the shield extending across the eyes and nose of the wearer for use in a specific activity involving an activity specific line of sight different than a straight ahead normal line of sight, the protective shield comprising: an arcuate lens that, in the as worn orientation, curves to fully cover the eyes and nose of the wearer, the arcuate lens comprising: (1) a front face portion having a front center of curvature, (2) a rear face portion having a rear center of curvature, the rear center of curvature being offset from the front center of curvature, (3) an optical axis extending through the front center of curvature and the rear center of curvature, the optical axis being substantially parallel to the activity specific line of sight, and (4) an optical center comprising a point at which the optical axis intersects the arcuate lens or intersects an imaginary extension of the arcuate lens such that the optical center is shifted in the direction of the activity specific line of sight that is horizontally displaced from the normal straight ahead line of sight.