title: Evaluation of the PuriLens contact lens care system: an automatic care system incorporating UV disinfection and hydrodynamic shear cleaning.
abstract: OBJECTIVE
  This study evaluates lens care using the PuriLens System, an advanced way to clean and disinfect soft hydrophilic lenses using subsonic agitation and UV radiation, respectively.
  
  
  METHODS
  A two-period crossover lens cleaning and safety investigation was conducted using 80 patients. Disinfecting efficacy was tested in accordance with standard FDA protocols. Lens compatibility was studied with Group I and Group IV lenses during the equivalent of a 6-month care regimen by measuring: lens power, base curve, wet diameter, refractive index, clarity, and tint. Safety was evaluated through slit-lamp findings, wearing time, comfort, and visual acuity.
  
  
  RESULTS
  The mean wearing time of patients in the study was 13.79 hours. No slit lamp findings greater than grade 2 were noted. Visual acuity was 20/25 or better in 92.5% of examinations. None of the patients lost more than two lines of acuity. Lens surface evaluation showed no deposits (grade 0) to very slight deposits (grade 1) in 94.4% of examinations. Lenses cleaned with the PuriLens System were cleaner by a statistically significant margin (P=0.02) compared to lenses digitally cleaned with a leading multi-purpose solution (ReNu, Bausch & Lomb). Overall, neither the Group I nor Group IV lenses were affected after 180 cleaning cycles.
  
  
  CONCLUSIONS
  The PuriLens System provides automatic lens care compliance, superior antimicrobial efficacy, and eliminates the need for daily digital cleaning.
authors.affiliation: Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock 72205, USA.
authors.forename: W
authors.initials: W
authors.lastname: Choate
authors.forename: F
authors.initials: F
authors.lastname: Fontana
authors.forename: J
authors.initials: J
authors.lastname: Potter
authors.forename: J
authors.initials: J
authors.lastname: Schachet
authors.forename: R
authors.initials: R
authors.lastname: Shaw
authors.forename: M
authors.initials: M
authors.lastname: Soulsby
authors.forename: E
authors.initials: E
authors.lastname: White
mesh_terms: D000293:Adolescent; D000328:Adult; D018639:Contact Lens Solutions / Q000494:pharmacology* / Q000592:standards; D003263:Contact Lenses, Hydrophilic; D018592:Cross-Over Studies; D004203:Disinfection / Q000379:methods*; D015817:Eye Infections / Q000517:prevention & control; D005260:Female; D006801:Humans; D006874:Hydrostatic Pressure; D008297:Male; D008875:Middle Aged; D012449:Safety; D014466:Ultraviolet Rays; D014792:Visual Acuity
chemical_list: D018639:Contact Lens Solutions