title: A comparison of the PlusoptiX S04 and A09 photoscreeners.
abstract: OBJECTIVE
  We compare the plusoptiX S04 and A09 photoscreeners on a single cohort of children.
  
  
  METHODS
  One hundred and thirteen children were evaluated on both the plusoptiX S04 and A09 photoscreener. A lay screener performed all of the testing prior to a pediatric ophthalmology examination. The order was alternated so that the S04 was performed first on one patient then second on the next to minimize fatigue bias.
  
  
  RESULTS
  Utilizing our modified criteria previously published, the plusoptiX S04 was found to have a sensitivity of 85%, specificity of 94%, false positive rate of 15%, and false negative rate of 6% in detecting American Association for Pediatric Ophthalmology and Strabismus-defined amblyopia factors. The plusoptiX A09 was found to have a sensitivity of 92%, specificity of 88%, false positive rate of 11%, and false negative rate of 8%.
  
  
  CONCLUSIONS
  The plusoptiX S04 and A09 photoscreeners perform similarly when used by a lay screener to evaluate the same population of children.
authors.affiliation: Wilmer Eye Institute, Baltimore, Maryland, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Singman
authors.forename: Noelle
authors.initials: N
authors.lastname: Matta
authors.forename: Jing
authors.initials: J
authors.lastname: Tian
authors.forename: Abby
authors.initials: A
authors.lastname: Brubaker
authors.forename: David
authors.initials: D
authors.lastname: Silbert
mesh_terms: D002648:Child; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004867:Equipment Design; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012030:Refractive Errors / Q000175:diagnosis*; D015203:Reproducibility of Results; D013285:Strabismus / Q000175:diagnosis*; D015351:Vision Screening / Q000295:instrumentation*