3Kymes SM,Walline JJ,Zadnik K, et al. Changes in the quali- ty-of-life of people with keratoconus [J]. Am J Ophthahnol, 2008,145:611-617.
4Davis LJ,Schechtman KB,Wilson BS,et al. Longitudinal chang- es in visual acuity in keratoconus [J]. Invest Ophthalmol Vis Sci, 2006,47 : 489-500.
5Higaki S,Shimomura Y,Kano K. Characteristics of orthokeratolo- gy in keratoconus[Jl.J Jpn CL Soc,1996,38:5-8.
6Gore DM,Shortt AJ,Allan BD. New clinical pathways for kerato- conusey[J]. Eye,2012,12:257-268.
7Kanellopoulas AJ. Collagen cross-linking in early keratoeonus with riboflavin in a femtosecond laser-created pocket: initial clinical results[J]. J Refract Surg,2009,25 : 1034-1037.
8Zhang ZY, zhang XR. Corneal collagen cross-linking for kerato- conic cornea pretreated with PRK[J]. J Refract Surg,2012,28: 605.
9Ertan A, Muftuoglu O. Keratoconus clinical findings according to different age and gender groups [J]. Cornea, 2008, 27: 1109-1113.
10Kok YO, Tan GF, Loon SC, et al.Review: Keratoconus in Asia [J]. Cornea,2012,31:581-593.
