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二级参考文献10
1Edrington TB, Gundel RE, Libassi DP et al. Variables affecting rigid contact lens comfort in the collaborative longitudinal evaluation of keratoeonus (CLEK)study. Optom Vis Sci, 2004, 81 (3):182-188.
2O" DonneU C, Maldonado - Codina C. Hyper - Dk Piggyback Contact Lens System for Keratoconus. Eye Contact Len, 2004,30 (1): 44-48.