Table 2 Best cutoff values for using tumbling E and Landolt C charts for amblyopia diagnosis in children aged < 84 months in receiver operating characteristic curve analysis.

From: A reassessment and comparison of the Landolt C and tumbling E charts in managing amblyopia

Visual acuity chart

AUC (95% CI)

Best cutoff value in logMAR (Snellen equivalent)

p value

Tumbling E

0.966 (0.930–1.000)

 + 0.1364 (20/27)

 < 0.001

Landolt C

0.935 (0.878–0.991)

 + 0.2385 (20/35)

 < 0.001

  1. AUC area under curve, CI confidence interval.
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