References
- Andreassen TT, Simonsen AH, Oxlund H. Biomechanical properties of keratoconus and normal corneas. Exp Eye Res 1980;31:435–441.
- Espandar L, Meyer J. Keratoconus: overview and update on treatment. Middle East Afr J Ophthalmol 2010 Jan;17:15–20.
- Shetty R, D’Souza S, Ramachandran S, et al. Decision making nomogram for intrastromal corneal ring segments in keratoconus. Indian J Ophthalmol 2014 Jan;62:23–28.
- Shivanna Y, Nagaraja H, Kugar T, et al. Femtosecond laser enabled keratoplasty for advanced keratoconus. Indian J Ophthalmol 2013;61:469–472.
- Wollensak G, Spoerl E, Seiler T. Riboflavin/ultraviolet-a-induced collagen crosslinking for the treatment of keratoconus. Am J Ophthalmol 2003;135:620–627.
- Rabinowitz YS. Keratoconus. Surv Ophthalmol 1998;42:297–319.
- Torquetti L, Ferrara P. Corneal Asphericity Changes after Implantation of Intrastromal Corneal Ring Segments in Keratoconus. J Emmetropia 2010;1:178–181.
- Greenstein SA, Fry KL, Hersh PS. Corneal topography indices after corneal collagen crosslinking for keratoconus and corneal ectasia: one-year results. J Cataract Refract Surg 2011 Jul;37(7):1282–1290.
- Queirós A, Villa-Collar C, Jorge J, et al. Multi-aspheric description of the myopic cornea after different refractive treatments and its correlation with corneal higher order aberrations. J Optom 2012;5:171–181.
- Kiely PM, Smith G, Carney LG. The mean shape of the human cornea. Opt Acta (Lond) 1982;29:1027–1040.
- Stojanovic A, Wang L, Jankov MR, et al. Wavefront optimized versus custom-q treatments in surface ablation for myopic astigmatism with the wavelight ALLEGRETTO laser. J Refract Surg 2008;24:779–789.
- Yebra-Pimentel E, González-Jéijome JM, Cerviño A, et al. Corneal asphericity in a young adult population. Clinical implications. Arch Soc Esp Oftalmol 2004 Aug;79(8):385–392.
- Torquetti L, Ferrara G, Ferrara P. Correlation of anterior parameters in keratoconus patients. Int J Kerat Ect Cor Dis 2012;1:87–91.
- Gatinel D, Malet J, Hoang-Xuan T, et al. Analysis of customized corneal ablations: theoretical limitations of increasing negative asphericity. Invest Ophthalmol Vis Sci 2002;43:941–948.
- Manns F, Ho H, Parel J-M, et al. Ablation profiles for wavefront- guided correction of myopia and primary spherical aberration. J Cataract Refract Surg 2002;28:766–774.
- Roberts CJ, Dupps WJ Jr. Biomechanics of corneal ectasia and biomechanical treatments. J Cataract Refract Surg 2014;40:991–998.
- Shetty R, Nagaraja H, Pahuja NK, et al. Safety and efficacy of epi-bowman keratectomy in photorefractive keratectomy and corneal collagen crosslinking: a pilot study. Curr Eye Res 2015;19:1–7.
- Fadlallah A, Dirani A, Chelala E, et al. Non-topography-guided PRK combined with CXL for the correction of refractive errors in patients with early stage keratoconus. J Refract Surg 2014;30:688–693.
- Kanellopoulos AJ. Comparison of sequential vs same-day simultaneous collagen cross-linking and topography-guided PRK for treatment of keratoconus. J Refract Surg 2009;25:S812–S818.
- Shetty R, D’Souza S, Srivastava S, et al. Topography-guided custom ablation treatment for treatment of keratoconus. Indian J Ophthalmol 2013;61:445–450.
- Cennamo G, Intravaja A, Boccuzzi D, et al. Treatment of keratoconus by topography-guided customized photorefractive keratectomy: two-year follow-up study. J Refract Surg 2008;24:145–149.
- Kasparova EA, Kasparov AA. Six-year experience with excimer laser surgery for primary kerato-conus in Russia. J Refract Surg 2003;19(Suppl):S250–S254.
- Raiskup-Wolf F, Hoyer A, Spoerl E, et al. Collagen crosslinking with riboflavin and ultraviolet-A light in keratoconus: long-term results. J Cataract Refract Surg 2008;34:796–801.
- Krueger RR, Kanellopoulos AJ. Stability of simultaneous topography-guided photorefractive keratectomy and riboflavin/UVA cross-linking for progressive keratoconus: case reports. J Refract Surg 2010;26:S827–S832.
- Kanellopoulos AJ, Binder PS. Collagen cross-linking (CCL) with sequential topography-guided PRK: a temporizing alternative for keratoconus to penetrating keratoplasty. Cornea 2007;26:891–895.
- Kymionis GD, Kontadakis GA, Kounis GA, et al. Simultaneous topography-guided PRK followed by corneal collagen cross-linking for keratoconus. J Refract Surg 2009;25:S807–S811.
- Kanellopoulos AJ, Asimellis G. Keratoconus management: long-term stability of topography-guided normalization combined with high-fluence CXL stabilization (the Athens Protocol). J Refract Surg 2014;30:88–93.
- Kymionis GD, Grentzelos MA, Kankariya VP, et al. Long-term results of combined transepithelial phototherapeutic keratectomy and corneal collagen crosslinking for keratoconus: cretan protocol. J Cataract Refract Surg 2014;40:1439–1445.
- Jhanji V, Sharma N, Vajpayee RB. Management of keratoconus: current scenario. Br J Ophthalmol 2011 Aug;95(8):1044–1050.
- Kymionis GD, Portaliou DM, Kounis GA, et al. Simultaneous topography-guided photorefractive keratectomy followed by corneal collagen cross-linking for keratoconus. Am J Ophthalmol 2011;152:748–55.
- Hashemi H, Seyedian MA, Miraftab M, et al. Corneal collagen cross-linking with riboflavin and ultraviolet a irradiation for keratoconus: long-term results. Ophthalmology 2013;120:1515–1520.
- Wittig-Silva C, Whiting M, Lamoureux E, et al. A randomized controlled trial of corneal collagen cross-linking in progressive keratoconus: preliminary results. J Refract Surg 2008;24:S720–S725.
- Kontadakis GA, Kankariya VP, Tsoulnaras K, et al. Long-term comparison of simultaneous topography-guided photorefractive keratectomy followed by corneal cross-linking versus corneal cross-linking alone. Ophthalmology 2016 Feb 17. [Epub ahead of print].
- Gobbe M, Guillon M. Corneal wavefront aberration measurements to detect keratoconus patients. Contact Lens Anterior Eye 2005;28;57–66.
- Radhakrishnan H, O’Donnell C. Aberrometry in clinical practice: case series. Cont Lens Anterior Eye 2008;31:207–211.