Study definition

The Shahroud School Children Eye Cohort Study (SSCECS) is aimed to identify the causes of Visual disorders and refractive errors in children.
The first phase of this study is performed in 2015 for primary school children (children between 6 to 12 years old) in rural and urban area of Shahroud, northeast Iran. At this stage 6624 student randomly selected and invited in study. Finally 5620 (84.8%) of them participated In the study.
Full optometric examination, corrected and uncorrected visual acuity and if necessary, glasses prescription were done for all children. Other examinations included measurement of blood pressure, anthropometry and full dental examination. Children are referred to an ophthalmologist when specific examinations were needed.
It is planned to repeat all examination every 2 years for 10 years.

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