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Comparative Study
. 2019 Jan-Mar;63(1):35-37.

Is LEA symbol better compared to Snellen chart for visual acuity assessment in preschool children?

Undrakonda Vivekanand  1 , Sarita Gonsalves  2 , Shailaja S Bhat  3
Affiliations
Comparative Study

Is LEA symbol better compared to Snellen chart for visual acuity assessment in preschool children?

Undrakonda Vivekanand et al. Rom J Ophthalmol. 2019 Jan-Mar.

Abstract

Aim: To compare visual acuity using the LEA symbol chart with Snellen E test chart in preschool children of age 3-5 years. Patients and methods: Inclusion criteria: 50 emmetropic children aged 3 to 5 years. Exclusion criteria: Strabismus, amblyopia, ametropia, and any organic eye disease. A pseudo randomized protocol was used to test visual acuity (VA) in each subject monocularly on both eyes using Snellen E chart and LEA symbol chart. Visual acuity for both charts was scored as smallest optotype size which the child correctly identified 3 of maximum 4 optotypes. The strength of agreement on VA between two charts was tested using Interclass correlation coefficient (ICC). A Mann-Whitney U test was applied to compare both the groups. Results: Boys: Girls = 26:24 with a mean age and standard deviation of 4.12 + 0.79 years. ICC between Snellen's and LEA symbol chart was 0.256 and 0.213 for right and left eye respectively. Analysis of the two samples using Mann-Whitney test showed a significant difference between the two charts (p value <0.000). Conclusion: LEA symbol test showed only a fair agreement with Snellen E charts for visual acuity measurements. Visual acuity measurement with LEA symbol chart showed significantly higher scores as compared to Snellen's chart.

Keywords: LEA symbols; Snellen chart; preschool children; visual acuity.

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References

    1. Becker RH, Hübsch SH, Graf MH, Kaufmann H. Preliminary report: examination of young children with Lea symbols. Strabismus. 2000;8(3):209–213. - PubMed
    1. Amitava AK, Kewlani D, Khan Z, Razzak A. Assessment of a modification of Bruckner's test as a screening modality for anisometropia and strabismus. Oman Journal of Ophthalmol. 2011;4(2):102. - PMC - PubMed
    1. Hyvärinen L. LEA vision test system for assessment and screening. [Sunday Novemeber 2017];[Online] Good lite. 2017 Available at: http://www.leatest.fi/n/vistests/instruct/LEA_Vision_Test_System.pdf.
    1. Lithander J. Two techniques to evaluate visual acuity from the age of 18 months. Strabismus. 1996;4(1):15–23. - PubMed
    1. Dobson V, Clifford-Donaldson CE, Miller JM, Garvey KA, Harvey EM. A comparison of Lea Symbol vs. ETDRS letter distance visual acuity in a population of young children with a high prevalence of astigmatism. J AAPOS. 2009;13(3):253–257. - PMC - PubMed

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