Comparing distance visual acuity measurement with a novel eye chart and the Landolt C chart in a population of children aged 6-18 years.
OBJECTIVE
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.
The Department of Ophthalmology, Emory University School of Medicine, 1365 B Clifton Rd NE, Atlanta, GA, 30322, USA.
John P
JP
Gorham
The Department of Ophthalmology, Emory University School of Medicine, 1365 B Clifton Rd NE, Atlanta, GA, 30322, USA.|Department of Neurology, Emory University School of Medicine, Atlanta, GA, USA.|Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA, USA.
Beau B
BB
Bruce
The Department of Ophthalmology, Emory University School of Medicine, 1365 B Clifton Rd NE, Atlanta, GA, 30322, USA. amy.hutchinson@emory.edu.
Amy K
AK
Hutchinson
D000293:Adolescent; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009885:Ophthalmology / Q000379:methods; D012044:Regression Analysis; D015203:Reproducibility of Results; D014786:Vision Disorders / Q000175:diagnosis*; D014787:Vision Tests / Q000295:instrumentation* / Q000379:methods; D014792:Visual Acuity
International ophthalmology; Pediatric ophthalmology; Visual acuity charts; Visual acuity testing