Comparison of the biometric measurements calculated with Zeiss IOL-Master and WaveLight OB-820

Figures & data

Figure 1 Bland–Altman plot of AL (preoperative).

Abbreviations: AL, axial length; SD, standard deviation.

Figure 2 Bland–Altman plot of AL (postoperative).

Abbreviations: AL, axial length; SD, standard deviation.

Figure 3 Bland–Altman plot of R2 (postoperative).

Note: R2, vertical corneal diameter.
Abbreviation: SD, standard deviation.

Figure 4 Bland–Altman plot of RSE (postoperative).

Abbreviations: RSE, radius/spherical equivalent; SD, standard deviation.

Table 1 Demographic characteristics of study participants

Gender	No	Grade II	Grade III	Age, years
Male	28	12	16	59.5±10.4
Female	28	15	13	61.3±9.5

Note: Data are presented as mean ± standard deviation.

Table 2 Preoperative and postoperative values of measured parameters

	Preoperative		Postoperative		P-value
	Mean	SD	Mean	SD
IOL-Master
ACD (mm)	3.17	0.44	4.53	0.54	0.03*
AL (mm)	24.19	1.24	24.13	1.23	0.13
R1 (mm)	7.89	0.36	7.90	0.37	0.47
R2 (mm)	7.72	0.34	7.75	0.38	0.83
RSE	7.81	0.35	7.8	0.35	0.74
Cyl (D)	0.78	0.56	0.86	0.54	0.02*
OB-820
ACD	3.23	0.41	4.62	0.34	0.04*
AL	24.23	1.25	24.15	1.24	0.13
R1	7.88	0.37	7.89	0.36	0.63
R2	7.73	0.34	7.75	0.33	0.94
RSE	7.8	0.35	7.82	0.34	0.69
Cyl	0.79	0.5	0.81	0.45	0.21

Notes: R1, horizontal corneal diameter; R2, vertical corneal diameter.

* Statistical significance.

Abbreviations: SD, standard deviation; ACD, anterior chamber depth; AL, axial length; RSE, radius/spherical equivalent; Cyl, cylinder.

Table 3 Comparisons of preoperative and postoperative differences

Parameters	Average	SD	P-value
ACD			0.19
IOL-Master	1.36	0.41
OB-820	1.39	0.45
AL			0.03*
IOL-Master	0.06	0.05
OB-820	0.08	0.03
R1			0.35
IOL-Master	0.00	0.06
OB-820	0.02	0.06
R2			0.20
IOL-Master	0.02	0.07
OB-820	0.01	0.09
RSE			0.15
IOL-Master	0.01	0.04
OB-820	0.02	0.07
Cyl			0.79
IOL-Master	0.08	0.51
OB-820	0.02	0.50

Notes: R1, horizontal corneal diameter; R2, vertical corneal diameter.

* Statistical significance.

Abbreviations: SD, standard deviation; ACD, anterior chamber depth; AL, axial length; RSE, radius/spherical equivalent; Cyl, cylinder.