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Rigid gas-permeable lens adherence: a patient-dependent phenomenon
1Cornea and Contact Lens Research Unit, School of Optometry, University of New South Wales, Kensington, Australia.
Summary
Rigid gas-permeable (RGP) lens binding occurred in 49% of wearers during overnight wear. This adherence phenomenon is largely patient-dependent, with significant individual differences observed.
Area of Science:
- Ophthalmology
- Optometry
- Biomaterials Science
Background:
- Rigid gas-permeable (RGP) contact lenses are widely used for vision correction.
- Lens binding, or adherence, is a potential complication of overnight RGP lens wear.
- Understanding the incidence and repeatability of RGP lens binding is crucial for patient safety and lens care.
Purpose of the Study:
- To determine the incidence and intrasubject repeatability of RGP lens binding.
- To assess RGP lens binding over a 7-day period of overnight wear.
- To identify factors influencing RGP lens binding.
Main Methods:
- Ten subjects with no prior RGP lens experience participated.
- Overnight wear of RGP lenses was monitored for 7 days.
- Lens binding was assessed via subject self-reporting upon eye opening and clinical examination 2 hours post-awakening.
Main Results:
- An overall incidence of 49% for RGP lens binding was reported by subjects.
- Seven out of ten subjects experienced lens binding at least once.
- At 2 hours post-awakening, 36% of lenses showed persistent binding with clinical signs, indicating a lower apparent incidence.
Conclusions:
- RGP lens binding is a common occurrence during overnight wear.
- Significant individual variability in lens binding incidence suggests a patient-dependent etiology.
- Despite consistent lens fitting, patient-specific factors play a primary role in RGP lens binding.