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Richter,D., Dumbleton,K., Guthrie,S., Woods,C., Jones,L., Fonn,D. Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement in Canada. Canadian Journal of Optometry 2010;72,1:10-19. [ Show Abstract ]
Purpose: To access current recommendations by optometrists for replacement frequency (RF) of silicone hydrogels (SH) and daily disposable (DD) contact lenses in Canada, determine rates of non-compliance with recommendations by both the optometrist and patient, and investigate reasons for non-compliance. Methods: Survey packages were sent to optometrists in Canada who had agreed to participate. Patients completed survey questions regarding demographics and contact lens wearing patterns, including recommended and actual contact lens RF. Optometrists were asked to provide lens information and their recommendation for RF. Fifty-eight optometrists returned 654 surveys, of which 578 were eligible for analysis. Results: Seventy percent of patients were female with a median age of 32 years. Lens type distribution was 18% DD, 35% two-week SH, and 47% one-month SH. Six percent were worn for extended wear. Daily wear median wearing time was 12 hours/day, a median of five days/week for DD, seven days/week for SH (two-week and one-month). Optometrists’ recommendations were non-compliant with the manufacturers’ recommended RF for 6% of DD, 35% of two week, and 2% of one-month patients. Patients were non-compliant with recommendations from both the manufacturer and optometrist for 12% of DD, 43% of two-week, and 31% of one-month lens wearers. The most common reason for non-compliance was forgetting which day to replace lenses. Fifty-six percent thought a reminder system would help with compliance. A higher proportion of compliant patients followed the RF because of confidence in their optometrist. Conclusions: Optometrists generally recommended RFs consistent with manufacturers’ recommendations for DD and one-month SH lenses but often recommended longer intervals for two-week SH lenses. Patients were most compliant when wearing DD lenses and least compliant when wearing two-week SH lenses. Communication between the patient and optometrists concerning the risks of non-compliance, or initiating a reminder system might improve compliance.
Guthrie S, Woods J, Keir N, Dillehay S, Tyson M, Griffin R, Fonn D, Jones L, Irving E. Controlling lens induced myopia in chickens with peripheral lens design. Optom Vis Sci 2011;88:E-Abstract 110421.
Woods J, Guthrie S, Keir N, Choh V, Fonn D, Jones L, Irving E. Myopia development – what can the chicken tell us?. Contact Lens & Anterior Eye 2011;34,Supplement 1:s13.
Woods J, Guthrie S, Keir N, Dillehay S, Tyson M, Griffin R, Jones L, Irving E. The effect of a unique lens designed for myopia progression control (MPC) on the level of induced myopia in chicks. Invest Ophthalmol Vis Sci 2011;51:E-Abstract 6651.
Dumbleton K, Woods C, Jones L, Guthrie S, Fonn D. Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement. Contact Lens & Anterior Eye 2009;32,5:213.
Jones L, Brodland G, Horst C, McDonald M, Guthrie S. A novel method for measuring contact lens tensile properties. Contact Lens Ant Eye 2009;32,5:254.
Dumbleton K, Woods C, Jones L, Guthrie S, Fonn D. Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement. Contact Lens Ant Eye 2009;32,5:229.
Dumbleton K, Richter D, Guthrie S, Woods C, Jones L, Fonn D. Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement. CAO (Charlottetown, PEI), 2009.
Brodland G, Jones L, Horst C, McDonald M, Guthrie S. A novel method for measuring contact lens tensile properties. Optom Vis Sci 2009;85:E-abstract 095818.
Dalton K, Guthrie S, Jones L. pH, osmolality and viscosity of artificial tears. Optom Vis Sci 2008;84. [ Show Abstract ]
E-Abstract 085310
Dalton K, Jones L, Guthrie S. Osmolality and viscosity of artificial tears. Optom Vis Sci 2008;85. [ Show Abstract ]
E-abstract85310
Dalton K, Jones L, Guthrie S. Physical properties of artificial tears. Contact Lens & Anterior Eye 2008;31,5:272.
Guthrie S, Simpson T, Varikooty J, Fonn D. Background subtraction and contrast enhancement for interferometric images of the human corneal tear film. Invest Ophthalmol Vis Sci 2006;47,5:2399.
Guthrie S. Effect of dual-focus soft contact lens wear on axial myopia progression in children - An article review. ContactLensUpdate.com 2011.
Richter D, Dumbleton K, Guthrie S, Woods C, Jones L, Fonn D. Patient and practitioner compliance with silicone hydrogel and daily disposable lens replacement in Canada. Canadian Journal of Optometry 2010;72,1:10-19.
Study participants receive $20 per hour. Time commitment varies from study to study. All studies conducted by the CCLR have received ethics clearance through the Office of Research Ethics at the University of Waterloo.
© 2012 Centre for Contact Lens Research
