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Erschienen in:
08.11.2016 | Case Report
Comparing distance visual acuity measurement with a novel eye chart and the Landolt C chart in a population of children aged 6–18 years
Erschienen in: International Ophthalmology | Ausgabe 6/2017
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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.