Topography-guided custom ablation treatment for treatment of keratoconus

• Main Authors: Rohit Shetty, Sharon D′Souza, Samaresh Srivastava, R Ashwini
• Format: Article
• Language: English
• Published: Wolters Kluwer Medknow Publications 2013-01-01
• Series: Indian Journal of Ophthalmology
• Subjects: Epidemiology; keratoconus; prevalence; Disease pathogenesis; genetic heterogeneity; genetics and genomics; genome-wide association study; genomic loci; linkage mapping; molecular mechanisms; whole exome-genome sequencing; Deregulation; ectasia; gene expression; mass spectroscopy; proteomics; signaling pathways; Cornea; crosslinking; modulus; Corneal topography; imaging; optical coherence tomography; placido disc based topography; Ectatic disease; scheimpflug imaging; Keratoconus; ocular allergy; vernal keratoconjunctivitis; Contact lens; piggy back contact lenses; rigid gas permeable; scleral lens; SynergEyes; toric soft contact lens; Corneal cross-linking techniques; new technologies; riboflavin; Collagen cross linking; Corneal collagen cross-linking; hypoosmolar riboflavin; thin cornea; transepithelial collagen cross-linking; Corneal cross-linking; radiant exposure; ultraviolet-A; Accelerated corneal cross linking; corneal laser surgery; corneal ectasia; UV light; Laser in situ keratomileusis surgery; very high fluence collagen cross-linking; corneal ectosia; LASIK ectosia prophylaxis; Cornea collagen cross linking; long term results; Corneal collagen cross linking; corneal transplant; pediatric keratoconus; Collagen cross-linking; microbial keratitis; fungus; acanth; topography-guided custom ablation treatment; treatment
• Online Access: http://www.ijo.in/article.asp?issn=0301-4738;year=2013;volume=61;issue=8;spage=445;epage=450;aulast=Shetty
• ISSN: 0301-4738; 1998-3689

Keratoconus is a progressive ectatic disorder of the cornea which often presents with fluctuating refraction and high irregular astigmatism. Correcting the vision of these patients is often a challenge because glasses are unable to correct the irregular astigmatism and regular contact lenses may not fit them very well. Topography-guided custom ablation treatment (T-CAT) is a procedure of limited ablation of the cornea using excimer laser with the aim of regularizing the cornea, improving the quality of vision and possibly contact lens fit. The aim of the procedure is not to give a complete refractive correction. It has been tried with a lot of success by various groups of refractive surgeons around the world but a meticulous and methodical planning of the procedure is essential to ensure optimum results. In this paper, we attempt to elucidate the planning for a T-CAT procedure for various types of cones and asphericities.