Validity of vision screening tests by teachers among school children in Mashhad, Iran

Ophthalmic Epidemiology
Hadi OstadiMoghaddamMehdi Khabazkhoob

Abstract

To determine the sensitivity and specificity of vision screening in Iranian schools where teachers have provided screening services for over 10 years. In a cross-sectional study, using random cluster sampling, 1163 school children were selected from 14 clusters. Data of vision tests performed by teachers were derived from 847 student records and compared with data obtained by optometrists. Measurement of the uncorrected visual acuity was done using the E chart by both the teachers and the optometrists. Examinations performed by optometrists were regarded as gold standard in this study and the sensitivity and specificity of the examinations performed by teachers were evaluated against them. Uncorrected visual acuity worse than 20/25 in the better eye was considered as the cut-off point for students' visual impairment. The sensitivity and specificity of the screening tests performed by the teachers were 37.5% and 92.0%, respectively. The positive and negative predictive values were 25.0% and 95.4%, respectively. There was no significant difference in the validity of the vision test between males and females (P = 0.093 for sensitivity and P = 0.052 for specificity). Our findings showed that teachers missed a significant number of ...Continue Reading

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Citations

Jan 15, 2015·Strabismus·Hassan HashemiSara Soroush
Sep 28, 2013·Ophthalmic Epidemiology·Parveen RewriDharamvir Raghav
Jul 15, 2016·Journal of Ophthalmic & Vision Research·Parveen RewriVijay Gupta
Jun 29, 2017·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Srinivas MarmamulaGullapalli N Rao
Nov 23, 2017·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Soraya GhaderiMehdi Khabazkhoob
Nov 17, 2017·Strabismus·Mohammad FaghihiMehdi Khabazkhoob
Sep 25, 2017·Ophthalmic Epidemiology·Dipesh BhattaraiMadan Prasad Upadhyay

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