title: Intraobserver reliability of the Teller Acuity Card procedure in infants with perinatal complications.
abstract: OBJECTIVE
  Intraobserver test-retest reliability of the Teller Acuity Card (TAC) procedure for estimating grating acuity was assessed in 79 infants who had been treated in a neonatal intensive care unit for preterm birth and/or other perinatal complications.
  
  
  METHODS
  Subjects were tested monocularly at one or more of four different age intervals that ranged between 2.5 and 18.5 mo corrected age. Testers were masked to the location and spatial frequency of the grating on each card.
  
  
  RESULTS
  Of the intraobserver test-retest scores, 91% differed by no more than one octave and 68% differed by no more than 0.5 octave. Intraobserver agreement was similar to that reported previously for healthy, preterm infants. Reliability was uniform between infants of differing levels of risk for abnormal visual development but bore effects of low tester ratings of confidence.
  
  
  CONCLUSIONS
  The results demonstrate the reliability of the TAC procedure but suggest that test sessions should be repeated when tester confidence in validity of results is low.
authors.affiliation: Section on Child and Family Research, National Institute of Child Health and Human Development, Bethesda, MD, USA.
authors.forename: Clay
authors.initials: C
authors.lastname: Mash
authors.forename: Velma
authors.initials: V
authors.lastname: Dobson
mesh_terms: D005865:Gestational Age; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007232:Infant, Newborn, Diseases / Q000209:etiology / Q000503:physiopathology*; D015588:Observer Variation; D015203:Reproducibility of Results; D014787:Vision Tests / Q000295:instrumentation*; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*