Piette SD , Sergott RC . Pathological optic-disc cupping .Lachenmayr BJ , Drance SM , Airaksinen PJ . Diffuse field loss and diffuse retinal nerve-fiber loss in glaucoma .10 .周文炳.临床青光眼.第2版.北京:人民卫生出版社. 2000 : 206-297 . ......