Abstract
Background: Measuring visual acuity is a critical component of optometric examinations, particularly for preschool children. Accurate measurement of visual acuity in this age group is essential, as it helps assess their ability to see clearly. This study aimed to compare the visual acuity of preschool children aged 3 to 5 years using two different charts: the HOTV and Broken Ring charts.
Method: The study was conducted among 153 preschool children between the ages of 3 to 5 years (mean age 4.21 ±0.80 SD), in Ikpoba-Okha Local Government Area, Benin City, Edo State, Nigeria. The visual acuity of the participants was measured using both the HOTV and Broken Ring charts. Data analysis was performed using the Wilcoxon signed-rank test to evaluate statistical difference between variables.
Results: Mean visual acuity measured with the HOTV chart was -0.045 ± 0.202, while the mean visual acuity with the Broken Ring chart was 0.014 ± 0.223. The Wilcoxon Signed-rank test revealed a statistical difference between VA obtained with the two charts (p<0.00001). The study also found a statistically significant difference with age (p=0.0184 and 0.003) for HOTV and Broken Ring charts respectively. However, there was no statistically significant difference between genders (p = 0.749 for HOTV chart and 0.447 for Broken Ring chart).
Conclusion: The findings suggest that preschool children produced more reliable visual acuity results with the HOTV letter chart compared to the Broken Ring chart. Therefore, it is crucial to consider the type of visual acuity chart used when assessing the vision of preschool children to ensure accuracy in measurement.
Keywords:
- Preschool children
- Visual acuity
- HOTV Chart
- Broken rings Charts
- Optotype
How to Cite:
Atuanya, G. N., Idogen, O. S., Eichenede, E. O., Omoregbe, B. O. & Odjimogho, E., (2026) “Comparing Visual Acuity amongst Preschool Children using HOTV Letter Chart and Broken Ring Chart”, African Eye Health and Vision Science Journal 1(1), 24-32. https://doi.org//goaj.2 (external link, opens in new tab).
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