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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.
Summary
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.
- 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.