title: Computerized videokeratoscopy contact lens software for RGP fitting in a bilateral postkeratoplasty patient: a clinical case report.
abstract: Computerized videokeratoscopy systems now allow interactive rigid gas permeable (RGP) fitting evaluation using fluorescein pattern simulations through updated software programs. We used Computed Anatomy's Topographic Modeling System-1 (TMS-1) Custom Design Contact Lens Program successfully to refit a symptomatic bilateral post-penetrating keratoplasty patient. No trial lenses were used. For each eye the base curve, optic zone size, and edge lift were chosen from the optimal fluorescein pattern designed and titrated on the TMS-1 unit. Lens powers were based on the patient's previous lenses and overrefraction. Dispensed lenses provided a clinically acceptable fit, good comfort, and maximal visual acuity, and no adjustments were necessary. Corneal videokeratoscopy can be successfully employed to titrate an RGP fit, even on irregular corneas.
authors.affiliation: Department of Ophthalmology, Case Western Reserve University, University Hospitals of Cleveland, OH 44106.
authors.forename: L B
authors.initials: LB
authors.lastname: Szczotka
authors.forename: W
authors.initials: W
authors.lastname: Reinhart
mesh_terms: D001251:Astigmatism / Q000209:etiology / Q000628:therapy*; D003261:Contact Lenses; D003315:Cornea / Q000033:anatomy & histology*; D005260:Female; D005451:Fluorescein Angiography; D015590:Fluorophotometry; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D015948:Keratoplasty, Penetrating / Q000009:adverse effects*; D008875:Middle Aged; D011474:Prosthesis Design; D017755:Prosthesis Fitting / Q000379:methods; D012984:Software