| 摘要 |
Safety glasses have a one-piece unitary lens with a left eye plano-convex portion and a right eye plano-convex portion, each having an independent radius of curvature in the range of 5 to 8 diopters. A corrective lens segment is integrally positioned in each plano-convex portion. The corrective lens segments are preferably semi-circular with a straight upper edge and are surrounded by the plano-convex portion. Side shields are formed integrally with the lens. A frame includes a top piece extending along the lens and side shields, and temples hinged to the top piece.
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