Document Detail


Automated measurement of resolution acuity in infants using remote eye-tracking.
MedLine Citation:
PMID:  25352118     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Purpose: To validate a novel, automated test of infant resolution acuity based on remote eye-tracking. Methods: Infants aged 2-12 months were tested binocularly using: (i) a new Adaptive Computerized Test of Infant Vision using Eye-tracking [ACTIVE], and (ii) Keeler Infant Acuity Cards [KIAC]. The ACTIVE test ran automatically, using remote eye-tracking to assess whether the infant fixated a black-and-white grating of variable spatial frequency. Test-retest reliability was assessed by performing each test twice. Accuracy was assessed by comparing acuity measures across tests and with established age-norms, and by comparing low-contrast acuity estimates in adults with data reported previously. Results: All infants completed the ACTIVE test at least once. Median test duration was 101 seconds. Measured visual acuity increased with age [p < 0.001], and 90% of mean acuity estimates were within previously published 90% tolerance limits (based on acuity-card age norms). Acuity estimates were also correlated, within-subjects, with results from the KIAC [p = 0.004]. In terms of reliability, 86% of acuity estimates deviated by ≤1 octave, with no significant difference in test-retest reliability between the ACTIVE and KIAC procedures [p = 0.461]. In adults, acuity estimates from the ACTIVE test did not differ significantly from values reported by previous authors [p > 0.183]. Conclusions: ACTIVE provides a rapid, automated measure of resolution acuity in preverbal infants. It performs comparably to the current clinical gold standard (Acuity Cards) in terms of testability, reliability, and accuracy, and its principles can be extended to measure other visual functions.
Authors:
Pete R Jones; Sarah Kalwarowsky; Janette Atkinson; Oliver J Braddick; Marko Nardini
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-28
Journal Detail:
Title:  Investigative ophthalmology & visual science     Volume:  -     ISSN:  1552-5783     ISO Abbreviation:  Invest. Ophthalmol. Vis. Sci.     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-10-29     Completed Date:  -     Revised Date:  2014-10-30    
Medline Journal Info:
Nlm Unique ID:  7703701     Medline TA:  Invest Ophthalmol Vis Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 by Association for Research in Vision and Ophthalmology.
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