title: Daily disposable vs. disposable extended wear: a contact lens clinical trial.
abstract: BACKGROUND
  The purpose of this work was to compare traditional standards of contact lens success and patient-reported preferences in the daily-disposable and disposable extended-wear contact lens modalities.
  
  
  METHODS
  This study was a randomized, cross-over contact lens clinical trial involving 50 patients. After the baseline examination, two outcome examinations were performed including the self-administration of the Refractive Status and Vision Profile (RSVP) survey, an additional survey, and masked visual acuity and slit-lamp assessments.
  
  
  RESULTS
  No differences were noted on the RSVP when comparing treatment modalities. Patients were considered equally successful in terms of wearing time, overall comfort, visual acuity, and ocular health criteria. In terms of patient preferences, a significant number of patients preferred the disposable extended-wear modality over the daily-disposable modality (chi2(1) = 4.08, p = 0.04). Patients preferred disposable extended-wear over daily-disposables due to convenience (odds ratio = 30.33).
  
  
  CONCLUSIONS
  Disposable extended-wear represents a convenient contact lens option for contact lens patients.
authors.affiliation: The Ohio State University, College of Optometry, Columbus 43210-1240, USA. nichols.142@osu.edu
authors.forename: J J
authors.initials: JJ
authors.lastname: Nichols
authors.forename: G L
authors.initials: GL
authors.lastname: Mitchell
authors.forename: K
authors.initials: K
authors.lastname: Zadnik
mesh_terms: D000293:Adolescent; D000328:Adult; D003262:Contact Lenses, Extended-Wear; D003263:Contact Lenses, Hydrophilic; D003315:Cornea / Q000502:physiology; D018592:Cross-Over Studies; D004209:Disposable Equipment; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D012029:Refraction, Ocular; D014792:Visual Acuity
chemical_list: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate