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Table 4 Mean ± standard deviation of the main discriminators in the Down syndrome (DS) keratoconus (DS-KC), DS keratoconus suspect (DS-KCS), DS non-ectatic comparison (DS-C), and non-DS normal control (NC) groups of the study

From: Tomography-based definition of keratoconus for Down syndrome patients

Index DS-KC
(n = 25)
DS-KCS
(n = 46)
DS-C
(n = 154)
NC
(n = 200)
Minimum corneal thickness (μm) 484.12 ± 32.34 492.28 ± 37.57 515.48 ± 30.36 546.9 ± 40.5
Corneal Volume (mm3) 57.45 ± 4.37 55.13 ± 3.35 57.62 ± 3.26 61.19 ± 4.04
Belin Ambrosio display-total deviation 2.98 ± 1.44 2.26 ± 0.66 1.72 ± 1.02 1.20 ± 0.53
Anterior HOA (μm) 1.13 ± 1.00 0.60 ± 0.17 0.55 ± 0.18 0.37 ± 0.09
Posterior vertical coma (μm) 0.15 ± 0.19 0.06 ± 0.04 0.05 ± 0.03 0.02 ± 0.02
Anterior vertical coma (μm) 0.70 ± 0.77 0.29 ± 0.19 0.20 ± 0.13 0.14 ± 0.09
Total HOA (μm) 1.12 ± 0.89 0.62 ± 0.17 0.57 ± 0.19 0.38 ± 0.12
  1. Differences between the four groups were significant by one-way ANOVA and post hoc Scheffe for all indices except aberration indices between DS-KCS and DS-C groups