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Jae Yong Han, Hyun Goo Kang, Hyung Keun Lee; Comparison of the ocular biometry and intraocular lens power measured by a new optical biometry device and standard biometers. Invest. Ophthalmol. Vis. Sci. 2018;59(9):2202.
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© ARVO (1962-2015); The Authors (2016-present)
To assess the degree of agreement in biometric measurements and calculated intraocular lens (IOL) power between a new optical A-scan interferometer biometer with Dual Scheimpflug analyzer (Galilei-G6) and standard reference biometers such as anterior segment optical coherence tomography (AS-OCT), A-scan ultrasonography, and partial coherence laser interferometer (IOL-Master 500) in cataract surgery patients.
90 eyes from 70 consecutive patients receiving planned cataract surgery underwent preoperative and postoperative measurements. The ocular biometrics including axial length (AXL), average keratometry (Kav), anterior chamber depth (ACD), and calculated IOL power were obtained by the Galilei-G6 (Ziemer, Biel, Switzerland), AS-OCT (CASIA SS-1000; Tomey Corp., Nagoya, Japan), ultrasonography, and IOL-Master 500 (Carl Zeiss AG, Oberkochen, Germany). Post-operative refractive outcomes were also compared between the biometers.
There were no significant differences in Galilei G6 versus IOL-Master for measurements of AXL (23.91 ± 2.17 vs 24.43 ± 1.41 mm , respectively, p=0.242), Kav (43.54 ± 1.53 vs 43.77 ± 1.38 diopters, p=0.511), calculated IOL power (18.89 ± 3.35 vs 19.09 ± 3.21, p=0.802), and predicted IOL power (-0.34 ± 0.95 vs -0.36 ± 0.85 diopters, p=0.912). When compared to post-operative refractive outcomes, there were no significant differences at either Day 2 or Day 30 between Galilei G6 and IOL-Master. For measurements of ACD, Galilei G6 showed minimal difference compared to AS-OCT although there were significant differences between all biometers (274.5 ± 42.7 vs 276.6 ± 40.6).
The Galilei G6 provided precise ocular biometrics that were well correlated with results from standard biometers, and in particular, obtained accurate ACD measurements compared to AS-OCT. Furthermore, prediction of postoperative refraction using Galilei G6 was comparable to the IOL-Master 500.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
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