Comparison of Fourier-Domain and Time-Domain Optical Coherence Tomography in the Measurement of Thinnest Corneal Thickness in Keratoconus

Table 1

Difference and correlation analysis of the TCT from the RTVue-OCT and Visante-OCT.

	RTVue-OCT				Visante-OCT				Difference			Correlation		ICC
	Mean	SD	95% CI-U	95% CI-L	Mean	SD	95% CI-U	95% CI-L	Mean	SD				(95% LoA)
Normal eyes	530.4	19.7	500.2	564.5	521.5	18.3	493.4	555.2	8.9	6.9	<0.001	0.938	<0.001	0.915 (0.906–0.952)
Keratoconus	425.0	58.2	307.7	504.6	424.4	55.7	310.7	499.8	0.6	10.2	0.604	0.985	<0.001	0.984 (0.976–0.990)
Subgroup 1; (keratoconus)	469.5	26.5	433.4	518.6	466.2	25.9	430.7	517.3	3.2	7.7	0.009	0.957	<0.001	0.950 (0.899–0.974)
Subgroup 2; (keratoconus)	376.0	41.7	286.7	425.7	378.3	41.3	291.3	423.0	−2.3	11.8	0.223	0.960	<0.001	0.959 (0.924–0.978)