Table 3. Intrasession Repeatability of 8 Different Devices in Measuring Mean Keratometry (N = 35).

Device	Session	Mean (D) ± SD	Sw (D)	2.77 Sw (D)	COV (%)	ICC
Tomey RC	1st	43.36±1.31	0.03	0.08	0.06	1.000
	2nd	43.36±1.33	0.03	0.07	0.06	1.000
Topcon KR	1st	43.32±1.34	0.06	0.16	0.13	0.998
	2nd	43.33±1.33	0.06	0.17	0.14	0.998
IOLMaster	1st	43.47±1.32	0.02	0.06	0.05	1.000
	2nd	43.48±1.32	0.03	0.07	0.06	1.000
EyeSysVista	1st	43.09±1.26	0.11	0.32	0.26	0.992
	2nd	43.09±1.26	0.10	0.29	0.24	0.993
Medmont	1st	43.57±1.33	0.07	0.18	0.15	0.999
	2nd	43.60±1.33	0.06	0.17	0.14	0.998
Topolyzer	1st	43.37±1.34	0.11	0.29	0.24	0.994
	2nd	43.37±1.32	0.10	0.28	0.23	0.994
Pentacam	1st	43.38±1.31	0.07	0.18	0.15	0.998
	2nd	43.38±1.32	0.06	0.17	0.14	0.998
Sirius	1st	43.44±1.33	0.09	0.25	0.21	0.996
	2nd	43.48±1.34	0.08	0.21	0.18	0.997

D = diopter, SD = standard deviation, Sw = within-subject standard deviation, COV = within-subject coefficient of variation, ICC = intraclass correlation coefficient.