Acquisition Time for Swept-Source Optical Biometry Plus Corneal Power Measurement During Cataract Evaluation

Figures & data

Table 1 Mean Acquisition Time for the Different Devices

Time (Seconds)	IOLMaster 700 with CT	IOLMaster 700	IOLMaster 700 + Cassini	IOLMaster 700 + Pentacam HR	p value
Mean ± SD	19.63 ± 5.02	20.70 ± 5.58	62.94 ± 15.75	53.27 ± 22.72	<0.001*
Range	[11.88, 40.60]	[11.28, 40.43]	[31.28, 115.73]	[31.09, 177.94]

Notes: p-value was obtained with the rANOVA test. *Significant differences <0.05.

Abbreviations: CT, central topography; SD, standard deviation.

Table 2 Agreement of K1, K2, TK1, TK2, EKR1 and EKR2 (Diopters) Measurements Between the Three Devices

	Mean Difference ± SD	95% CI	95% LoA	p value
IOLMaster 700 K1 vs Cassini K1	0.01±0.38	[−0.06, 0.08]	[−0.73, 0.75]	0.851
IOLMaster 700 K1 vs Pentacam HR K1	0.05±0.30	[−0.01, 0.11]	[−0.53, 0.64]	<0.001*
Cassini K1 vs Pentacam HR K1	0.04±0.43	[−0.04, 0.12]	[−0.82, 0.90]	<0.001*
IOLMaster 700 K2 vs Cassini K2	−0.02±0.37	[−0.10, 0.04]	[−0.75, 0.70]	0.337
IOLMaster 700 K2 vs Pentacam HR K2	0.08±0.26	[0.02, 0.13]	[−0.43, 0.60]	<0.001*
Cassini K2 vs Pentacam HR K2	0.10±0.40	[0.02, 0.18]	[−0.67, 0.89]	<0.001*
IOLMaster 700 TK1 vs Cassini EKR1	0.01±0.41	[−0.07, 0.09]	[−0.80, 0.82]	0.616
IOLMaster 700 TK1 vs Pentacam HR EKR1	0.30±0.43	[0.21, 0.39]	[−0.55, 1.16]	<0.001*
Cassini EKR1 vs Pentacam HR EKR1	0.29±0.58	[0.17, 0.41]	[−0.85, 1.45]	<0.001*
IOLMaster 700 TK2 vs Cassini EKR2	−0.02±0.39	[−0.10, 0.04]	[−0.79, 0.74]	0.548
IOLMaster 700 TK2 vs Pentacam HR EKR2	0.42±0.50	[−0.32, 0.52]	[−0.57, 1.42]	<0.001*
Cassini EKR2 vs Pentacam HR EKR2	0.45±0.62	[0.32, 0.57]	[−0.77, 1.68]	<0.001*

Notes: p-value obtained with the Tukey’s test; *Significant differences <0.05.

Abbreviations: SD, standard deviation; CI, confidence interval; LoA, limits of agreement.

Figure 1 Bland-Altman plots obtained showing the mean difference versus average for the comparison between the different devices for K1 and K2. Mean (continuous line), lower and upper limits of agreement (±1.96SD, standard deviation, peripheral dotted lines) and lower and upper confidence intervals (95%) are depicted.

Figure 2 Bland-Altman plots obtained showing the mean difference versus average for the comparison between the different devices for TK1, TK2, EKR1 and EKR2. Mean (continuous line), lower and upper limits of agreement (±1.96SD, standard deviation, peripheral dotted lines) and lower and upper confidence intervals (95%) are depicted.