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:: Volume 24, Issue 4 (Iranian Journal of Ophthalmology 2012) ::
2012, 24(4): 3-10 Back to browse issues page
The Prevalence of Amblyopia and Strabismus among Schoolchildren in Northeastern Iran, 2011
AbbasAli Yekta Dr., Hassan Hashemi Dr., Elham Azizi , Farhad Rezvan Dr., Hadi Ostadimoghaddam Dr. * , Akbar Derakhshan Dr., Abbas Azimi Dr., Mehdi Khabazkhoob , Ali Akbar Khadem Maboudi Dr.
, ostadih@mums.ac.ir
Abstract:   (8062 Views)

Purpose : To determine the prevalence of amblyopia and strabismus in the schoolchildren of the city of Bojnourd, Iran

Methods : In 2010, randomized stratified cluster sampling was employed in a cross-sectional study on primary and junior high schoolchildren. All the examinations were performed in schools. All students received refraction, vision and subjective refraction tests. The cover test was used to determine tropia. Amblyopia was defined as best corrected visual acuity (BCVA) 20/30 or less or a
2-line interocular optotype acuity difference with no pathology.

Results : Of 2,020 selected students, 1,551 participated in the study (response rate: 76.7%). The prevalence of amblyopia was 2.3% (95% CI: 1.6-3.1) 2% of the male students and 2.5% of the female students had amblyopia (P=0.508). Amblyopia decreased significantly with age (P=0.032). The most common type of amblyopia was anisometropic followed by isometropic amblyopia. Hyperopia and astigmatism were the most common refractive errors in individuals with amblyopia. The prevalence of strabismus in the students was 2% (95% CI: 1.3-2.7). Of female and male students, 2.4% and 1.4% had strabismus, respectively (P=0.160). Of the students with strabismus, 67.7%, 25.8% and 6% had exotropia, esotropia and vertical deviations, respectively.

Conclusion : The prevalence of amblyopia and strabismus in the current study was intermediate. However, correction of refractive errors at young ages can largely prevent amblyopia and strabismus in children.

 

Iranian Journal of Ophthalmology 201224(4):3-10 © 2012 by the Iranian Society of Ophthalmology
Keywords: Amblyopia, Strabismus, Schoolchildren, Iran
Full-Text [PDF 203 kb]   (2800 Downloads)    
Type of Study: Original | Subject: Strabismus
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Yekta A, Hashemi H, Azizi E, Rezvan F, Ostadimoghaddam H, Derakhshan A, et al . The Prevalence of Amblyopia and Strabismus among Schoolchildren in Northeastern Iran, 2011. Iranian Journal of Ophthalmology. 2012; 24 (4) :3-10
URL: http://irjo.org/article-1-736-en.html


Volume 24, Issue 4 (Iranian Journal of Ophthalmology 2012) Back to browse issues page
مجله چشم پزشکی ایران Iranian Journal of Ophthalmology
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