TITLE

Impact of amblyopia on vision at age 12 years: findings from a population-based study

AUTHOR(S)
Robaei, D.; Kifley, A.; Rose, K. A.; Mitchell, P.
PUB. DATE
April 2008
SOURCE
Eye;Apr2008, Vol. 22 Issue 4, p496
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
AimsTo report prevalence of amblyopia and long-term impact of its treatment on vision in a population-based sample of 12-year-old Australian children.MethodsLogarithm of minimum angle of resolution (logMAR) visual acuity (VA) was measured in 2353 children (response rate 75.3%); visual impairment was defined as VA<6/12. Amblyopia was defined using various criteria of best-corrected VA, together with an amblyogenic factor and absence of significant organic pathology. Corroborative historical data on previous diagnosis and treatment were obtained from parental questionnaires.ResultsForty-four children (1.9%) were diagnosed with amblyopia, unilateral in 40 and bilateral in four. Isolated anisometropia was the most frequent cause (41%), followed by strabismus (25%), combined anisometropia and strabismus (23%), and high ametropia (9%). Myopia, hyperopia, and astigmatism were present in 28, 51, and 44% of amblyopic children, respectively, compared to 12, 4, and 9% of non-amblyopic children. Mean best-corrected VA in amblyopic eyes was 44.5 logMAR letters (Snellen equivalent 6/9), range: 11–60 letters. Most children with amblyopia (84%) had been treated. Only 27% were visually impaired in their amblyopic eye.ConclusionsThis report documents a low amblyopia prevalence in a population of 12-year-old Australian children. Amblyopic visual impairment was infrequent in this sample despite absence of mandatory vision screening.Eye (2008) 22, 496–502; doi:10.1038/sj.eye.6702668; published online 23 March 2007
ACCESSION #
31660664

 

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