Jung Wook Lee; Seung Hun Park; Min Cheol Seong; Hee Yoon Cho; Min Ho Kang

doi:10.7469/JKOS.2015.56.04.515

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Lee, Park, Seong, Cho, and Kang: Comparison of Ocular Biometry and Postoperative Refraction in Cataract Patients between Galilei-G6® and IOL Master®

Original Article

J Korean Ophthalmol Soc 2015;56(4):515-520.

Published online: 7 September 2015

DOI: https://doi.org/10.7469/JKOS.2015.56.04.515

Comparison of Ocular Biometry and Postoperative Refraction in Cataract Patients between Galilei-G6^® and IOL Master^®

Jung Wook Lee, MD, Seung Hun Park, MD, Min Cheol Seong, MD, PhD, Hee Yoon Cho, MD, PhD, Min Ho Kang, MD, PhD

Department of Ophthalmology, Hanyang University Guri Hospital, Hanyang University College of Medicine, Guri, Korea

￭ Address reprint requests to Min Ho Kang, MD, PhD Department of Ophthalmology, Hanyang University Guri Hospital, #153 Gyeongchun-ro, Guri 471-701, Korea Tel: 82-31-560-2350, Fax: 82-31-564-9479 E-mail: ocularimmunity@gmail.com

Received 5 July 201411 October 2014 Accepted 7 March 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

초록

Purpose:

To compare the axial lengths, anterior chamber depths, and keratometric measurements and to predict postoperative refractions of Dual Scheimpflug analyzer Galilei G6^® and intra ocular lens (IOL) Master^®.

Methods:

A total of 50 eyes in 50 patients who received cataract surgery were included in the present study. The axial length, anterior chamber depth, and keratometry were measured using 2 types of partial coherence interferometries (Galilei G6^® and IOL Master^®). The SRK/T formula was used to calculate IOL power and the predictive error which subtracts predictive refraction from postoperative refraction was compared between the ocular biometry devices.

Results:

Axial lengths were 23.36 ± 0.80 mm and 23.36 ± 0.90 mm measured by Galilei G6^® and IOL Master^®, respectively. Axial length measured by Galilei G6^® was not statistically significant compared with IOL Master^® ( p = 0.321). The anterior chamber depth and keratometry were 3.22 ± 0.35 mm and 44.29 ± 1.40 D measured by Galilei G6^® and 3.11 ± 0.46 mm and 44.39 ± 1.41 D measured by IOL Master^®, respectively. The differences of anterior chamber depth and keratometry between the 2 devices were statistically significant ( p < 0.001 and p = 0.028, respectively). The mean absolute prediction errors were 0.45 ± 0.37 D and 0.49 ± 0.39 D in Galilei G6^® and IOL Master^®, respectively and was not statistically significantly different ( p = 0.423).

Conclusions:

The ocular biometric measurements and prediction of postoperative refraction using Galilei G6^® were as accurate as with IOL Master^®.

Keywords: Axial length, Galilei G6^®, IOL Master^®, Partial coherence interferometry

References

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Figure 1.

Bland-Altman plot of axial length between Galilei G6® and IOL master® (95% limits of agreement for axial length difference Galilei G6®-IOL master® [-0.101, 0.087]. IOL = intra ocular lens.

Figure 2.

Bland-Altman plot of anterior chamber depth between Galilei G6® and IOL master® (95% limits of agreement for axial length difference: Galilei G6®-IOL master® [-0.22, 0.44]). IOL = intra ocular lens.

Figure 3.

Bland-Altman plot of keratometry between Galilei G6® and IOL master® (A), and auto refractive keratometry (ARK) (B) (95% limits of agreement for axial length difference: Galilei G6®-IOL master® [-0.69, 0.49]; Galilei G6®-ARK [-0.54, 0.44]). IOL = intra ocular lens.

Table 1.

Demographics and biometry measurements by Galilei G6®, IOL master®

	Galilei G6^®	IOL master^®	p-value^*
Age (years)	69.2 ± 9.07 (51-92)	-	-
Sex (M/F)	50 (20/30)	-	-
Cataract^†		-	-
Nuclear opacity	3.6 ± 0.2
Cortical opacity	1.8 ± 0.1
Posterior subcapsular	0.6 ± 0.1
AL (mm)	23.36 ± 0.80 (21.77-26.39)	23.36 ± 0.90 (21.71-26.52)	0.321
ACD (mm)	3.22 ± 0.35 (2.72-3.92)	3.11 ± 0.46 (2.21-3.97)	0.000
K (diopter)	44.29 ± 1.40 (41.29-47.10)	44.39 ± 1.41 (41.54-47.62)	0.028

Values are presented as mean ± SD unless otherwise indicated.

IOL = intra ocular lens; AL = axial length; ACD = anterior chamber depth; K = keratometry.

^* Paired t-test;

^† Cataract stage by Lens Opacities Classification System III (LOCS III).

Table 2.

Comparison of absolute prediction error among Galilei G6®, IOL master®

	Prediction error (diopter)			Number of eyes within (%)
	PE	Absolute PE	Range	0.5 D	1.0 D	1.5 D
Galilei G6®	-0.14 ± 0.58	0.45 ± 0.37	-1.48~1.33	31 (62)	15 (92)	4 (100)
IOL master®	-0.18 ± 0.60	0.49 ± 0.39	-1.42~0.92	29 (58)	16 (90)	5 (100)

Values are presented as mean ± SD unless otherwise indicated.

PE = prediction error; D = diopter; IOL = intra ocular lens.

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