title: The management of keratoconus using the corneal modeling system and a piggyback system of contact lenses.
abstract: The purpose of this report is to describe the use of the Corneal Modeling System (CMS) in the quantitative evaluation of the front surface of a soft contact lens on a keratoconic cornea. The management of one eye of a single case is presented as an example. A keratoconic patient fitted with an RGP lens presented with the signs and symptoms of discomfort, reduced wearing time and recurrent corneal erosions. Corneal topography was evaluated utilizing the CMS. The patient was then fitted with a soft contact lens. Next the entire front surface of the contact lens-fitted eye was measured with the CMS. Utilizing those data a piggyback lens was designed. As a result of this fitting technique corneal integrity improved, wearability increased and discomfort dissipated.
authors.affiliation: Indiana University, School of Optometry, Bloomington 47405.
authors.forename: P S
authors.initials: PS
authors.lastname: Soni
authors.forename: D R
authors.initials: DR
authors.lastname: Gerstman
authors.forename: D G
authors.initials: DG
authors.lastname: Horner
authors.forename: G G
authors.initials: GG
authors.lastname: Heath
mesh_terms: D000328:Adult; D003198:Computer Simulation; D003261:Contact Lenses; D003315:Cornea / Q000503:physiopathology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007640:Keratoconus / Q000503:physiopathology / Q000628:therapy*; D008297:Male