Israel Medical Association Journal

Background: The detection and correction of refractive errors is one of the priorities of the World Health Organization Initiative Vision 2020.

Objectives: To determine the factors related to a child having an ocular abnormality (poor vision, refractive error or other abnormality) among schoolchildren in northern Israel.

Methods: A cross-sectional population-based study was conducted among 2113 students aged 6-7 and 13-14 years old in 70 schools in northern Israel. Medical examination included vision history, clinical eye examination and vision testing. If a parent’s informed consent was available, eye drops (cycloplegia) were delivered for fundus and retinoscopy testing. An ophthalmologist was asked to determine the need for the child’s referral for further diagnostic procedures, treatment and/or follow-up. Multivariate analysis was limited to 1708 children, using data pertaining to the ophthalmologist’s decision regarding referral, as well as vision and retinoscopy results.

Results: Vision and/or ocular abnormality was prevalent in 21.5% (95% confidence interval 17.4–26.6%), predominantly among 13-14 year olds and Jewish children. Abnormal clinical findings were found in 5.7% of the students. Retinoscopy showed a higher prevalence of hypermetropia among 6-7 year olds and a higher prevalence of myopia and astigmatism among the 13-14 year olds. The multivariate analysis suggests an independent effect of retinoscopy abnormality (odds ratio = 3.85), vision abnormality (OR [1]= 2.42), Jewish ethnicity (OR = 1.62) and 13-14 year old age group (OR = 1.26) on the ophthalmologist’s referral decision.

Conclusions: Vision and/or ocular abnormality is an important health problem among schoolchildren in northern Israel. The independent effect of ethnicity and age on the ophthalmologist’s referral decision should be further explored.

Background: Uncorrected refractive error is the leading cause of visual impairment in children. In 2002 a screening project was launched in Israel to provide data on the effectiveness of the illiterate E-chart in identifying Jewish and Arab schoolchildren in need of a comprehensive eye examination.

Objectives: To present the aims, design and initial results of the visual screening project and the prevalence of vision abnormality in the study population.

Methods: A cross-sectional population-based study was conducted during 2002–2003 among first- and eighth-graders in 70 schools in northern Israel. The nurse's test included use of the illiterate E-chart to measure visual acuity. The medical examination included vision history, clinical eye examination, VA[1] and retinoscopy. The ophthalmologist's evaluation as to whether a child needed a referral for diagnostic procedures, treatment and/or follow-up was recorded and compared with explicit referral criteria formulated after data collection.

Results: Of 1975 schoolchildren, 31% had abnormal VA, defined as VA worse than 6/6 in at least one eye, and a quarter had VA equal or worse than 6/12 in both eyes. The prevalence of vision abnormality among the children was 22.4% when based on the evaluation of the field ophthalmologist and 26.1% when based on two sets of explicit severity scores and referral criteria.

Conclusions: Vision abnormality is a significant health problem among northern Israeli schoolchildren. This project is unique in scope and importance, providing evidence to assist policy making with regard to vision screening for schoolchildren (including data on test reliability and validity) and optimal VA cutoff level, and confirming the need for clinical guidelines regarding referral criteria.

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