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Standardized Rigid Contact Lens Fitting Protocol for Keratoconus
Optometry and Vision Science (1996)
  • Larry Davis, University of Missouri-St. Louis
  • Timothy B Edrington
  • Joseph T Barr
  • Karla Zadnik, Ohio State University
  • Ralph E. Gundel, State University of New York System
  • David P. Libassi, State University of New York System
  • Timothy T McMahon
  • Mae O. Gordon, Washington University in St. Louis
Keratoconus is typically managed by a variety of rigid contact lens fitting techniques and lens designs. The two most fundamental fitting techniques are apical corneal touch (including divided or three-point touch) and apical clearance. In the course of designing a multi-center study of keratoconus patients, a standardized keratoconus fitting protocol was developed. All contact lens parameter options are uniform except for base curve and secondary curve radii, which are determined by interpretation of fluorescein patterns using the CLEK Study trial lens set and protocol. The initial trial lens's base curve is the average keratometric reading; sequentially steeper lenses are applied until definite apical clearance is observed. We have evaluated the feasibility of this standardized fitting protocol on 30 keratoconus patients. Our results suggest that we have developed a standardized contact lens fitting set and fitting protocol to simplify contact lens management in patients with mild to moderate keratoconus.
Publication Date
July, 1996
Citation Information
Larry Davis, Timothy B Edrington, Joseph T Barr, Karla Zadnik, et al.. "Standardized Rigid Contact Lens Fitting Protocol for Keratoconus" Optometry and Vision Science Vol. 73 Iss. 6 (1996) p. 369 - 375
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