8Pincemail J, Dupuis M, Hans P, et al. Superoxide anion scavenging effect and superoxide dismutase activity of Ginkgo biloba exttact [ J ]. Experintia, 1989,45 ( 8 ) :708 -712.
9Hayashi LC, Hayashi S, Yanmoka K, et al. Ultravioletb exposure and type of lens opacity in ophthalmic patients in Japan [ J]. Sci Total Environ ,2003,302 ( 123 ) :53 -62.
10Dong X, Lofgren S,Ayala M, et al. Maximum tolerable dose for a- voidance of cataract induced by ultraviolet radiatiou2B for 18 to 60 week old rats[ J]. Exp Eye Res,2005,80(4 ) :561-566.