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Optom Vis Sci. 2016 Mar;93(3):259-65. doi: 10.1097/OPX.0000000000000799.

Comparison of Two Optical Biometers.

Author information

1
*MD, PhD †MD Department of Ophthalmology, Hallym University College of Medicine, Chuncheon Sacred Heart Hospital, Chuncheon, South Korea (all authors).

Abstract

PURPOSE:

To compare a new optical biometer device, Galilei G6 (Ziemer, Port, Switzerland), with the present optical biometer, Lenstar LS 900 (Haag-Streit, Koeniz, Switzerland), for intraocular lens (IOL) power calculation.

METHODS:

One hundred forty eyes of 140 cataract patients were evaluated with two optical biometers: the Galilei G6 and the Lenstar. The mean keratometry (K), axial length (AL), anterior chamber depth (ACD), crystalline lens thickness (LT), white-to-white (WTW), and IOL powers using the SRK/T, Holladay 1, Hoffer Q, and Haigis formulas were compared. The intrasession repeatability of the Galilei G6 measurements was assessed in 25 eyes.

RESULTS:

All ocular parameters measured by the Galilei G6 were highly repeatable (all intraclass correlation coefficients > 0.980). Although K and ACD did not show statistical differences between the two devices (all p > 0.05), the measurements for AL, LT, and WTW were statistically different for the two devices. The K, AL, ACD, LT, and WTW showed good correlations (r = 0.975, 0.998, 0.973, 0.946, and 0.710, respectively; all p < 0.001); however, the agreements of LT and WTW were not good between the two devices. The IOL powers using four formulas did not show statistical differences (all p > 0.05); however, agreements between the IOL powers were not strong. The ranges of 95% limit of agreements were between 1.54 and 1.90D according to the formulas.

CONCLUSIONS:

The ocular parameters and IOL powers using the Galilei G6 cannot be used interchangeably with those of the Lenstar in clinical practice.

PMID:
26760579
DOI:
10.1097/OPX.0000000000000799
[Indexed for MEDLINE]

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