-Rabinowitz YS, Keratoconus. Surv Ophthalmol. 1998;42:297-319.
-Pantanelli S, MacRae S, Jeong TM, Yoon G. Characterizing the wave aberration in eyes with keratoconus or penetrating keratoplasty using a high-dynamic range wavefront sensor. Ophthalmology. 2007;114:2013-21.
-Okamoto C, Okamoto F, Samejima T, Miyata K, Oshika T. Higher-order wavefront aberration and letter-contrast sensitivity in keratoconus. Eye.2007 Jun 8.
-Kymionis G, Siganos C, Tsiklis N, Anastasakis A, Yoo S, Pallikaris A, Astyrakakis N, Pallikaris I. Long-term Follow-up of Intacs in Keratoconus. Am J Ophthalmol. 2007;143:236-44.
-Shabayek MH, Alio JL. Intrastromal corneal ring segment implantation by femtosecond laser for keratoconus correction. Ophthalmology 2007;114:1643-52.