title: Measuring visual acuity in children using preferential looking and sine wave cards.
abstract: Preferential looking using square waves is commonly used to measure visual acuity of infants. Since sine-wave gratings have the advantage of presenting only a single spatial frequency, we completed a study to develop and validate a set of acuity cards using sine waves. The subjects were 83 children (mean age = 41.5 months, range = 3 to 69 months). The sine-wave cards were compared with Teller cards. Identical visual acuity was determined in 83% of the cases. Wilcoxon non-parametric analysis provided no evidence to reject the null hypothesis of equal visual acuities between the two methods. We conclude that sine-wave cards may be used to measure the preferential looking acuity of children.
authors.affiliation: School of Optometry, Medical Center, University of Alabama, Birmingham.
authors.forename: G R
authors.initials: GR
authors.lastname: Jackson
authors.forename: N S
authors.initials: NS
authors.lastname: Jessup
authors.forename: B L
authors.initials: BL
authors.lastname: Kavanaugh
authors.forename: V L
authors.initials: VL
authors.lastname: Moats
authors.forename: K M
authors.initials: KM
authors.lastname: Daum
authors.forename: W L
authors.initials: WL
authors.lastname: Marsh-Tootle
authors.forename: R P
authors.initials: RP
authors.lastname: Rutstein
mesh_terms: D002648:Child; D002675:Child, Preschool; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D015203:Reproducibility of Results; D015351:Vision Screening / Q000379:methods; D014787:Vision Tests / Q000295:instrumentation / Q000379:methods*; D014792:Visual Acuity