| 摘要 |
PCT No. PCT/GB86/00544 Sec. 371 Date Jul. 10, 1990 Sec. 102(e) Date Jul. 10, 1990 PCT Filed Sep. 15, 1986 PCT Pub. No. WO87/01821 PCT Pub. Date Mar. 26, 1987.The present invention provides a sunglass lens having a central region which is provided with an ultra-violet screening agent to protect the eye while the surrounding regions of the lens have little or no screening agent so as to permit tanning of the skin around the eye. In a preferred embodiment, the lens is additionally colored with tint, the darkness of which may vary over the surface area of the lens. In addition, the variation of tint over the surface of the lens is different from the variation of the ultra-violet screening agent. For example, the ultra-violet screening agent is most highly concentrated in the central portion of the lens whereas the colored tint is most highly concentrated around the periphery of the lens. |
