title: Contact lens-related adverse events and the silicone hydrogel lenses and daily wear care system used.
abstract: OBJECTIVE
  To investigate the incidence of adverse events related to the use of varying silicone hydrogel contact lens and lens solution combinations.
  
  
  METHODS
  Individuals with myopia (N = 558) participated in 1 or more of approximately 40-participant trials in a matrix of 20 silicone hydrogel contact lens and lens-solution combinations. Visits were at baseline, 2 weeks, 1 month, and 3 months. The mean study completion rate was 90% of the expected participant-months (final data set: 840 lens-solution combinations and 2271 participant-months). Adverse events were reported as the first occurrence of each type per 100 participant-months for each lens-solution combination.
  
  
  RESULTS
  The rate of all corneal infiltrative events (CIEs) was 3.1 per 100 participant-months (range, 0-10.5), and the rate of symptomatic CIEs was 1.7 per 100 participant-months (range, 0-10.5), including 1 case of microbial keratitis (0.04 per 100 participant-months). Rates for CIEs differed substantially among solution groups, with hydrogen peroxide having the lowest rate (0.6 per 100 participant-months; range, 0-0.9). The rate was 0.8 per 100 participant-months (range, 0-8.0) for superior epithelial arcuate lesions, which varied by lens type, 0.04 per 100 participant-months (1 case only) for corneal erosion, and 0.4 per 100 participant-months (range, 0-2.0) for contact lens papillary conjunctivitis, which was modified by type of solution. The rate of solution-induced corneal staining for all lens-solution combinations was 4.7 per 100 participant-months (range, 0-23) and varied significantly based on lens-solution combination (P < .001).
  
  
  CONCLUSIONS
  The frequency of adverse events varied with silicone hydrogel contact lens and lens solution combinations, with hydrogen peroxide having the lowest incidence of CIEs and solution-induced corneal staining, indicating that lens material and design, type of solution, and solution-lens interactions are likely contributing factors in this mode of lens wear.
authors.affiliation: BOptom, Institute for Eye Research, Level 3, Rupert Myers Building, University of New South Wales, Sydney, NSW 2052, Australia. carnt@ier.org.au
authors.forename: Nicole A
authors.initials: NA
authors.lastname: Carnt
authors.forename: Victoria E
authors.initials: VE
authors.lastname: Evans
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Naduvilath
authors.forename: Mark D P
authors.initials: MD
authors.lastname: Willcox
authors.forename: Eric B
authors.initials: EB
authors.lastname: Papas
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Frick
authors.forename: Brien A
authors.initials: BA
authors.lastname: Holden
mesh_terms: D000328:Adult; D018639:Contact Lens Solutions; D003263:Contact Lenses, Hydrophilic / Q000009:adverse effects*; D003316:Corneal Diseases / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D020100:Hydrogels; D015994:Incidence; D008297:Male; D009216:Myopia / Q000628:therapy*; D012029:Refraction, Ocular / Q000502:physiology; D012828:Silicones; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult
chemical_list: D018639:Contact Lens Solutions; D020100:Hydrogels; D012828:Silicones