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Standardized rigid contact lens fitting protocol for keratoconus

T B Edrington1, J T Barr, K Zadnik

  • 1Southern California College of Optometry, Fullerton, USA.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|June 1, 1996
PubMed
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This study developed a standardized contact lens fitting protocol for keratoconus (KC) patients. The new method simplifies fitting and management for mild to moderate KC, improving patient outcomes.

Area of Science:

  • Ophthalmology
  • Optometry
  • Corneal Disease

Background:

  • Keratoconus (KC) management relies on specialized rigid contact lens fitting.
  • Key techniques include apical corneal touch and apical clearance.
  • Standardization is needed for consistent KC patient care.

Purpose of the Study:

  • To develop and evaluate a standardized contact lens fitting protocol for keratoconus.
  • To simplify the management of rigid gas permeable lenses for KC patients.

Main Methods:

  • A multi-center study protocol was designed for keratoconus patients.
  • A standardized fitting set and protocol were developed, using CLEK Study trial lenses.
  • Base curve and secondary curve radii were determined by fluorescein pattern interpretation.

Related Experiment Videos

  • Sequential lens fitting aimed for apical clearance, starting with average keratometry.

    • Main Results:

    • The standardized protocol was evaluated for feasibility in 30 keratoconus patients.
    • Results indicate successful implementation of the protocol.
    • The developed protocol simplifies contact lens fitting for mild to moderate keratoconus.

    Conclusions:

    • A standardized contact lens fitting set and protocol for keratoconus have been developed.
    • This protocol can simplify contact lens management in patients with mild to moderate keratoconus.
    • Further multi-center studies can validate this approach for broader application.