title: The role of computerized corneal topography in rigid gas permeable contact lens fitting.
abstract: OBJECTIVE
  The purpose of this study was to determine the clinical utility of computerized corneal topography (CCT) in the fitting of rigid gas permeable (RGP) contact lenses.
  
  
  METHODS
  In this prospective study, we compared the clinically determined parameters to those obtained by CCT in 50 consecutive patients who underwent RGP lens fitting. The TMS-1 program was used for CCT, and we fit patients with Boston RGP contact lenses (type II, or Equalens). The final decision on the RGP lenses dispensed relied upon the clinical evaluation (slit lamp examination, fluorescein pattern, lens centration, and visual acuity).
  
  
  RESULTS
  The base curve of RGP lenses proposed by CCT was similar to that selected clinically (mean: 7.74 mm versus 7.81 mm). However, the mean diameter of the CCT proposed lenses was smaller than that selected clinically (9.31 mm versus 9.6 mm, P < 0.01). Divergence was more pronounced in keratoconus.
  
  
  CONCLUSIONS
  CCT is an important tool in RGP contact lens fitting. Clinical evaluation remains mandatory in determining the appropriate RGP lens.
authors.affiliation: University Department of Ophthalmology, AHEPA Hospital, Thessaloniki, Greece.
authors.forename: T
authors.initials: T
authors.lastname: Bufidis
authors.forename: A G
authors.initials: AG
authors.lastname: Konstas
authors.forename: E
authors.initials: E
authors.lastname: Mamtziou
mesh_terms: D003261:Contact Lenses; D019781:Corneal Topography; D006801:Humans; D011446:Prospective Studies; D017755:Prosthesis Fitting / Q000379:methods*; D012984:Software; D016896:Treatment Outcome