Rigid gas-permeable lens adherence: a patient-dependent phenomenon.
Ten unadapted subjects participated in a study to investigate the incidence and intrasubject repeatability of rigid gas-permeable (RGP) lens binding (adherence) over a 7-day period of overnight lens wear. An overall incidence of lens binding of 49% was found, based on subject self-assessment on eye opening. Seven of the 10 subjects experienced lens binding on at least one occasion. Two-thirds of lenses assessed as bound on eye opening were mobile at a clinical examination approximately 2 h after eye opening. The apparent incidence of lens binding at this time, based on lenses still bound and positive clinical signs of lens binding, was 36%. Despite equivalent lens fittings across the subject group, there were significant individual differences in the incidence of lens binding over the 7-day period, ranging from no binding to 100% incidence. This suggests that lens binding is primarily a patient-dependent phenomenon.
Swarbrick
H A
HA
Cornea and Contact Lens Research Unit, School of Optometry, University of New South Wales, Kensington, Australia.
Holden
B A
BA
D000268:Adhesiveness; D000328:Adult; D003261:Contact Lenses; D003315:Cornea / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D010353:Patient Education as Topic; D013997:Time Factors; D014792:Visual Acuity