Standardized Rigid Contact Lens Fitting Protocol for Keratoconus

Larry Davis; Timothy B Edrington; Joseph T Barr; Karla Zadnik; Ralph E. Gundel; David P. Libassi; Timothy T McMahon; Mae O. Gordon

doi:10.1097/00006324-199606000-00003

Standardized Rigid Contact Lens Fitting Protocol for Keratoconus

Larry Davis, Timothy B Edrington, Joseph T Barr, Karla Zadnik, Ralph E. Gundel, David P. Libassi, Timothy T McMahon, Mae O. Gordon

University of Missouri-St. Louis

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	American English
Journal	Optometry and Vision Science
Volume	73
DOIs	https://doi.org/10.1097/00006324-199606000-00003
State	Published - Jul 1996

Disciplines

Optometry

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Cite this

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title = "Standardized Rigid Contact Lens Fitting Protocol for Keratoconus",

abstract = " 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.",

author = "Larry Davis and Edrington, {Timothy B} and Barr, {Joseph T} and Karla Zadnik and Gundel, {Ralph E.} and Libassi, {David P.} and McMahon, {Timothy T} and Gordon, {Mae O.}",

year = "1996",

month = jul,

doi = "10.1097/00006324-199606000-00003",

language = "American English",

volume = "73",

journal = "Optometry and Vision Science",

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TY - JOUR

T1 - Standardized Rigid Contact Lens Fitting Protocol for Keratoconus

AU - Davis, Larry

AU - Edrington, Timothy B

AU - Barr, Joseph T

AU - Zadnik, Karla

AU - Gundel, Ralph E.

AU - Libassi, David P.

AU - McMahon, Timothy T

AU - Gordon, Mae O.

PY - 1996/7

Y1 - 1996/7

N2 - 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.

AB - 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.

U2 - 10.1097/00006324-199606000-00003

DO - 10.1097/00006324-199606000-00003

M3 - Article

VL - 73

JO - Optometry and Vision Science

JF - Optometry and Vision Science

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