Comparison of agreement and efficiency of a swept source-optical coherence tomography device and an optical low-coherence reflectometry device for biometry measurements during cataract evaluation

Figures & data

Figure 1 Study flowchart.

Notes: Patients were imaged with both the IOLMaster 700 and the LENSTAR LS 900. The total acquisition time and biometry values for each device were recorded.
Abbreviation: K, keratometry.

Table 1 Demographics of the study subjects

Age (years)
Mean ± SD	67±10
Median (range)	69.5 (35–83)
Gender, N (%)
Male	12 (38)
Female	20 (62)
Race, N (%)
Caucasian	25 (78)
African American	4 (13)
Other	3 (9)

Abbreviation: N, number of patients.

Table 2 Mean acquisition times of the IOLMaster 700 and LENSTAR LS 900

	LENSTAR LS 900	IOLMaster 700	P-value
Acquisition time (seconds)
Mean ± SD	168.8±67.2	44.5±12.4	<0.001

Note: P-value calculated with Wilcoxon signed-rank test.

Table 3 ICCs between the mean biometry values of the IOLMaster 700 and LENSTAR LS 900

Biometry values	LENSTAR LS 900 Mean ± SD	IOLMaster 700 Mean ± SD	Intraclass correlation coefficient (95% CI)
Axial length	23.7±1.25	23.7±1.24	0.9999 (0.9998–0.9999)
Anterior chamber depth	3.16±0.38	3.14±0.38	0.9993 (0.9989–0.9996)
Lens thickness	4.52±0.67	4.66±0.71	0.9571 (0.9268–0.9750)
Flat meridian K1	43.7±1.90	43.7±1.93	0.9922 (0.9869–0.9954)
Steep meridian K2	44.8±1.90	44.8±1.92	0.9926 (0.9874–0.9956)

Abbreviations: ICCs, intraclass correlation coefficients; K, keratometry.

Figure 2 Linear regression of the IOLMaster 700 vs the LENSTAR LS 900.

Notes: (A) Axial length, (B) anterior chamber depth, (C) lens thickness, (D) keratometry 1, and (E) keratometry 2.
Abbreviation: K, keratometry.

Figure 3 Bland–Altman plots showing the mean difference (dotted line) and 95% upper and lower limits of agreement (solid lines) for biometry measurements obtained by the IOLMaster 700 and LENSTAR LS 900.

Notes: (A) Axial length, (B) anterior chamber depth, (C) lens thickness, (D) keratometry 1, and (E) keratometry 2.
Abbreviation: K, keratometry.