Comparison of Optical versus Ultrasonic Biometry in Keratoconic Eyes

Table 2

Pairwise comparison of axial length, anterior chamber depth, lens thickness, and central corneal thickness in keratoconic eyes using the Lenstar and USG biometry.

Pairwise comparison	𝑛	Difference		ICC	95% limits of agreement	𝑃 value
		Mean (SD)	Median
CCT Lenstar-US biometer (µm)	42	−5.4 ± 19.6	−4.0	0.90	33.0 to −43.9	<0.001*
ACD Lenstar-US biometer (mm)	41	0.18 ± 0.17	0.17	0.85	0.51 to −0.16	<0.001*
LT Lenstar-US biometer (mm)	41	−0.13 ± 0.17	−0.14	0.67	0.20 to −0.46	<0.001*
AL Lenstar-US biometer (mm)	42	−0.10 ± 0.76	−0.16	0.75	1.39 to −1.59	<0.001*

∗Paired samples test, ICC: interclass correlation coefficient.
SD: standard deviation, ICC: interclass correlation coefficient, CCT: central corneal thickness, US: ultrasound, ACD: anterior chamber depth, LT: lens thickness, and AL: axial length.