Topographic Asymmetry Indices: Correlation between Inferior Minus Superior Value and Index of Height Decentration

Table 1

The AUROC of decentration indices.

Index	Normal versus KC + FFKC			Normal versus FFKC
	AUROC		AUROC compared to that of IHD ( value)	AUROC		AUROC compared to that of IHD ( value)
	Mean	SD		Mean	SD
(I‐S) value	0.768	0.048	0.092	0.582	0.071	0.135
IHD	0.840	0.039	—	0.700	0.061	—

KC = keratoconus; FFKC = forme fruste keratoconus; AUROC = area under the receiver operating characteristic; SD = standard deviation; (I‐S) value = inferior minus superior value; IHD = index of height decentration.