Patent ID: 7389543

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 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 across the eyes and nose of the wearer, the lens having an optical center and an apex, either or both of which can be on or off the lens, and a lower edge, and an optical axis that extends through the optical center and the optical axis is substantially parallel to an horizontally displaced from the activity specific line of sight of a right eye and a left eye, but not vertically displaced from the activity specific line of sight of the right eye and the left eye, wherein the optical center of the lens is displaced from the apex to a position that reduces object shift as the wearer shifts gaze from the normal straight ahead line of sight to the activity specific line of sight, and the optical axis is not substantially equidistant between the ASLS of the right eye and the left eye, but is closer to the ASLS of an eye toward which a direction of gaze is directed.