Table 1: Summary of the measures obtained with the IOL-Master 700, Cassini, and Pentacam devices. Abbreviations: steepest (K2) and flattest standard keratometric readings (K1), standard keratometric astigmatism (ΔD_K), steepest (TK2) and flattest total keratometric readings (TK1), standard total keratometric astigmatism (ΔD_TK), white-to-white corneal diameter (WTW). Concerning the Pentacam system, the equivalent keratometric readings (EKR) were considered as the total keratometric readings.

	IOL-Master 700 (IOLM)	Cassini (CAS)	Pentacam (PTC)	p-value
K1 (D)	43.13 (1.44) 43.20 (39.14 to 46.36)	42.74 (1.48) 42.90 (38.90 to 46.14)	43.02 (1.41) 43.10 (39.00 to 46.10)	<0.001 IOLM-PTC 0.001 IOLM-CAS <0.001 PTC-CAS <0.001
K2 (D)	44.01 (1.58) 43.97 (39.66 to 49.01)	43.69 (1.63) 43.69 (39.14 to 48.46)	43.90 (1.53) 43.85 (39.40 to 48.80)	<0.001 IOLM-PTC 0.003 IOLM-CAS <0.001 PTC-CAS <0.001
ΔD_K (D)	0.88 (0.73) 0.72 (0.00 to 5.26)	0.95 (0.72) 0.87 (0.05 to 5.15)	0.88 (0.70) 0.70 (0.00 to 5.10)	0.007 IOLM-PTC <0.001 IOLM-CAS <0.001 PTC-CAS <0.001
TK1 (D)	43.19 (1.46) 43.33 (38.99 to 46.54)	41.68 (1.46) 41.75 (36.21 to 44.80)	42.86 (1.46) 43.01 (38.45 to 46.01)	<0.001 IOLM-PTC <0.001 IOLM-CAS <0.001 PTC-CAS <0.001
TK2 (D)	44.07 (1.57) 44.14 (39.18 to 48.81)	42.70 (1.57) 42.67 (37.94 to 46.89)	43.62 (1.52) 43.75 (39.20 to 46.95)	<0.001 IOLM-PTC <0.001 IOLM-CAS <0.001 PTC-CAS <0.001
ΔD_TK (D)	0.88 (0.73) 0.67 (0.00 to 5.06)	1.02 (0.71) 0.87 (0.08 to 4.61)	0.76 (0.62) 0.65 (0.08 to 4.31)	<0.001 IOLM-PTC <0.001 IOLM-CAS <0.001 PTC-CAS <0.001
WTW (mm)	12.05 (0.41) 12.10 (11.20 to 13.00)	12.38 (0.55) 12.30 (11.30 to 14.70)	11.64 (0.44) 11.60 (10.50 to 12.80)	<0.001 IOLM-PTC <0.001 IOLM-CAS <0.001 PTC-CAS <0.001