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Related Experiment Videos

Predicting RGP daily wear success.

K A Polse1, A D Graham, R E Fusaro

  • 1Morton D. Sarver Laboratory for Cornea & Contact Lens Research, School of Public Health, University of California, Berkeley, CA 94720-2020, USA.

The CLAO Journal : Official Publication of the Contact Lens Association of Ophthalmologists, Inc
|August 12, 1999
PubMed
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Rigid gas permeable (RGP) lens wear can be successful for many patients, with younger individuals and specific ocular characteristics predicting better adaptation. Comfort remains a key factor for successful RGP lens wear.

Area of Science:

  • Ophthalmology
  • Optometry
  • Corneal Physiology

Background:

  • Rigid gas permeable (RGP) lenses are a preferred treatment for certain eye conditions.
  • Patient adaptation to full-time daily wear of RGP lenses can be challenging.
  • The Contact Lens Extended Wear Study (CLEWS) investigates RGP lens wear success.

Purpose of the Study:

  • To identify factors predicting successful adaptation to RGP daily wear.
  • To analyze reasons for RGP daily wear failure.
  • To evaluate demographic, historical, and ocular characteristics influencing RGP lens success.

Main Methods:

  • A randomized, controlled clinical trial involving 411 subjects fit with high oxygen transmissibility RGP lenses.
  • Subjects underwent an adaptation period to daily wear before randomization for extended wear.

Related Experiment Videos

  • Success defined as ≥14 hours/day wear without adverse ocular responses.

    • Main Results:

    • 69.6% of subjects achieved successful RGP extended wear.
    • Primary reasons for discontinuation were unacceptable comfort (75/125 failures) and poor vision.
    • Younger age, greater corneal curvature, and less predicted residual astigmatism correlated with higher success rates.

    Conclusions:

    • RGP lenses can achieve a high success rate in extended wear.
    • Patient comfort is a critical determinant of RGP lens wear success.
    • A Bayesian method is proposed to aid clinicians in selecting suitable RGP lens candidates.