Indian Journal of Ophthalmology

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 66  |  Issue : 7  |  Page : 924--928

Comparison of the efficacy of Lea Symbol chart and Sheridan Gardiner chart for preschool vision screening


Cigi M Paul, Sanitha Sathyan 
 Department of Ophthalmology, Little Flower Hospital and Research Centre, Angamaly, Kerala, India

Correspondence Address:
Sanitha Sathyan
Department of Ophthalmology, Little Flower Hospital and Research Centre, Angamaly, Kerala
India

Purpose: To compare the efficacy of Lea symbols (LS) chart and Sheridan Gardiner (SG) chart for vision screening among preschool children, in a semi-urban district of South India. Methods: Vision screening was conducted among 260 preschool children aged 3–5 years in cluster sampled kindergartens using LS chart and SG chart. Pass/fail scores and time taken for visual acuity (VA) estimation were compared. VA scores and time taken were compared using unpaired t-test. Sensitivity, specificity, and positive and negative predictive values were compared between the charts. Results: There was a significant difference between LS and SG charts in the VA score in both the eyes (P = 0.04). LS showed 76.09% pass score and 23.90% fail score, whereas SG showed 87.65% pass score and 12.35% fail score with a cutoff value of > 0.3 log MAR. Time for screening using LS was higher, when compared to SG, both for the right eyes (P < 0.001) and the left eyes (P < 0.001). The sensitivity of the LS was 94.74% (95% confidence interval [CI]: 70.13%–81.06%) and that of SG was 52.63% (95% CI: 45.29%–59.8%). The specificity of LS was 66.67% (95% CI: 90.26%–97.30%) and SG was 83.33% (95% CI: 70.12%–91.30%). Conclusion: LS chart showed better sensitivity and negative predictive value when compared to SG chart. However, SG chart showed better specificity and positive predictive value, and screening was less time-consuming. Considering the high sensitivity and negative predictive value, LS is the preferred tool, when compared to SG chart in preschool vision screening in our population.


How to cite this article:
Paul CM, Sathyan S. Comparison of the efficacy of Lea Symbol chart and Sheridan Gardiner chart for preschool vision screening.Indian J Ophthalmol 2018;66:924-928


How to cite this URL:
Paul CM, Sathyan S. Comparison of the efficacy of Lea Symbol chart and Sheridan Gardiner chart for preschool vision screening. Indian J Ophthalmol [serial online] 2018 [cited 2024 Mar 29 ];66:924-928
Available from: https://journals.lww.com/ijo/pages/default.aspx/article.asp?issn=0301-4738;year=2018;volume=66;issue=7;spage=924;epage=928;aulast=Paul;type=0