title: Predicting Short-term Performance of Multifocal Contact Lenses.
abstract: OBJECTIVE
  To investigate if initial multifocal contact lens (MFCL) performance predicts short-term dispensing performance.
  
  
  METHODS
  A retrospective analysis of 55 participants (Px) in a masked, crossover, clinical trial, using ACUVUE OASYS for Presbyopia and AIR OPTIX AQUA Multifocal. Subjective questionnaires were administered at the following instances: initial fitting, two take home questionnaires (THQ) completed between days 2 and 4 and at assessment, ≥5 days after fitting. Questionnaires included vision clarity and lack of ghosting at distance, intermediate and near at day/night time points rated on a 1 to 10 (1-step, 10 most favorable) rating scale. Vision stability, vision while driving, overall vision satisfaction, willingness to purchase and comfort, as well as acuity-based measures were also collected.
  
  
  RESULTS
  There were no statistical differences in comfort and vision at all distances, in vision stability or driving at either time points between THQ and assessment (P>0.05). However, there was a statistical decline in subjective overall vision satisfaction and comfort between fitting and assessment visits (P<0.001). Willingness to purchase remained the same at fitting and assessment in 68% of Px, whereas only 4% of Px converted to a positive willingness to purchase at assessment. The majority of acuity-based measures remained constant between fitting and assessment visits.
  
  
  CONCLUSIONS
  Initial performance at fitting was not able to predict short-term performance of MFCL. Subjective measures peaked at fitting and declined thereafter whereas acuity-based measures remained constant. Utility of subjective rating tools may aid practitioners to gauge success of MFCL.
authors.affiliation: Brien Holden Vision Institute (J.D., D.T., T.N., R.C.B.), Sydney, Australia; and School of Optometry and Vision Sciences (D.T., R.C.B.), Sydney, Australia.
authors.forename: Jennie
authors.initials: J
authors.lastname: Diec
authors.forename: Daniel
authors.initials: D
authors.lastname: Tilia
authors.forename: Thomas
authors.initials: T
authors.lastname: Naduvilath
authors.forename: Ravi C
authors.initials: RC
authors.lastname: Bakaraju
mesh_terms: D000328:Adult; D003263:Contact Lenses, Hydrophilic / Q000592:standards; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010342:Patient Acceptance of Health Care; D017060:Patient Satisfaction; D011305:Presbyopia / Q000534:rehabilitation*; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D014792:Visual Acuity