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Astigmatism in 12 year old Australian children: Comparisons with a 6 year old population

Huynh, Son C; Kifley, Annette; Rose, Kathryn A; Morgan, Ian; Mitchell, Paul

Description

PURPOSE. To study the distributions of refractive (RA), corneal (CA), and internal astigmatism (IA) in 12-year-old Australian children and to explore differences from previous findings in 6-year-old children. METHODS. Eligible year 7 students (2353/3144 [75.3%], median age, 12 years) from a random cluster sample of 21 high schools in Sydney, Australia, were examined by keratometry, cycloplegic autorefraction, and review of questionnaire data. RESULTS. Prevalence rates of RA, CA, and IA ≥1.0 D...[Show more]

dc.contributor.authorHuynh, Son C
dc.contributor.authorKifley, Annette
dc.contributor.authorRose, Kathryn A
dc.contributor.authorMorgan, Ian
dc.contributor.authorMitchell, Paul
dc.date.accessioned2015-12-10T22:26:49Z
dc.identifier.issn1552-5783
dc.identifier.urihttp://hdl.handle.net/1885/53917
dc.description.abstractPURPOSE. To study the distributions of refractive (RA), corneal (CA), and internal astigmatism (IA) in 12-year-old Australian children and to explore differences from previous findings in 6-year-old children. METHODS. Eligible year 7 students (2353/3144 [75.3%], median age, 12 years) from a random cluster sample of 21 high schools in Sydney, Australia, were examined by keratometry, cycloplegic autorefraction, and review of questionnaire data. RESULTS. Prevalence rates of RA, CA, and IA ≥1.0 D in right eyes were 6.7% (95% confidence interval [CI], 5.0-8.4), 26.6% (CI, 22.1-31.1), and 26.5% (CI, 22.9-30.0), respectively. RA was predominantly with-the-rule (WTR; 40.4%, CI, 32.6 to 48.2) and against-the-rule (ATR; 43.6%, CI, 35.7-51.5), CA was WTR (88.8%, CI, 86.3-91.3), and IA was ATR (90.2%, CI, 87.8-92.6). The girls had significantly greater CA and IA prevalence, with greater ATR astigmatism and lower oblique IA than did the boys. The European white-Australian children had lower CA prevalence than did the East Asian-Australian children and higher IA prevalence than did the South Asian-Australian children. Ethnic differences in RA prevalence were not significant, when adjusted for confounders. RA was more frequently ATR in European white than in other ethnic groups. Compensation between CA and IA reduced the magnitude of RA. Comparison with the data on 6-year-old children revealed minimal differences for all astigmatic components. CONCLUSIONS. There was a relatively low prevalence of RA, due to compensation between CA and IA. The minimal differences in all components of astigmatism between the two age cohorts suggest that astigmatism is stable between ages 6 and 12 years, although this conclusion needs to be confirmed in longitudinal studies.
dc.publisherAssociation for Research in Vision and Opthalmology
dc.sourceInvestigative Ophthalmology and Visual Science
dc.subjectKeywords: age distribution; article; astigmatism; Australia; comparative study; controlled study; cornea; eye refraction; female; high school; human; keratometry; major clinical study; male; preschool child; prevalence; priority journal; questionnaire; school child
dc.titleAstigmatism in 12 year old Australian children: Comparisons with a 6 year old population
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume48
dc.date.issued2007
local.identifier.absfor111303 - Vision Science
local.identifier.ariespublicationu9204316xPUB286
local.type.statusPublished Version
local.contributor.affiliationHuynh, Son C, University of Sydney (Westmead)
local.contributor.affiliationKifley, Annette, University of Sydney
local.contributor.affiliationRose, Kathryn A, University of Sydney
local.contributor.affiliationMorgan, Ian, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationMitchell, Paul, University of Sydney
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage73
local.bibliographicCitation.lastpage82
local.identifier.doi10.1167/iovs.06-0263
dc.date.updated2015-12-09T09:35:01Z
local.identifier.scopusID2-s2.0-33846914258
CollectionsANU Research Publications

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