Comparing distance visual acuity measurement with a novel eye chart and the Landolt C chart in a population of children aged 6–18 years

• Published in: International ophthalmology 2017-12, Vol.37 (6), p.1345-1348
• Main Authors: Gorham, John P., Bruce, Beau B., Hutchinson, Amy K.
• Format: Article
• Language: English
• Subjects: Acuity; Adolescent; Age; Case Report; Charts; Child; Children; Correlation coefficient; Correlation coefficients; Diabetes mellitus; Diabetic retinopathy; Eye; Female; Gold standard; Humans; Male; Medicine; Medicine & Public Health; Ophthalmology; Ophthalmology - methods; Regression Analysis; Reproducibility of Results; Retinopathy; Vision Disorders - diagnosis; Vision Tests - instrumentation; Vision Tests - methods; Visual Acuity
• ISSN: 0165-5701; 1573-2630
• DOI: 10.1007/s10792-016-0384-3

Purpose The Handy Eye Chart™ is designed to assist in evaluating the visual acuity of patients with non-standard communication styles. The Handy Eye Chart™ has been previously validated against the early treatment diabetic retinopathy study (ETDRS) chart. The aim of this research is to compare visual acuity outcomes with The Handy Eye Chart™ against the international gold standard, the Landolt C chart, in a population of children. Methods Sixty participants between the ages of 6 and 18 were recruited at the Pediatric Section of the Department of Ophthalmology at the Emory Eye Center. Visual acuity was evaluated using The Handy Eye Chart™ and the Landolt C Chart, altering the order of administration between charts. The visual acuity data were compared using t test, linear regression, and Bland–Altman analysis. Results The mean difference in visual acuity was 0.02 logMAR (CI 0.009–0.04, p  = 0.002). The correlation coefficient was 0.98. The Bland–Altman analysis shows the 95% limits of agreement between the charts to be −0.14 to 0.09 logMAR. Conclusions The Handy Eye Chart™ is a valid measure of visual acuity when compared with the international gold standard, the Landolt C Chart.