Comparison of anterior chamber depth measurements using Galilei, HR Pentacam, and Orbscan II

Abstract

These data indicate that in the assessment of normal eyes, Orbscan gives consistently higher measurements for anterior chamber depth compared with Galilei and Pentacam. Because the differences between Orbscan and either Galilei or Pentacam were not within clinically acceptable levels, they are not interchangeable in every clinical situation. However, the differences among anterior chamber depth values measured with Galilei and Pentacam were within clinically acceptable levels. Thus, these 2 systems can be regarded as interchangeable.

Anterior chamber depth measurements using Scheimpflug imaging and optical coherence tomography: Repeatability, reproducibility, and agreement

“…Salouti et al 21 found good agreement between ACD measurements (95% LoA from À0.11 to 0.12 mm) acquired by the Pentacam HR device and the Galilei device and state that the 2 devices can be regarded as interchangeable. We agree that the statistically significant overestimation by the Galilei G2 device compared with the Pentacam device (approximately 0.1 mm) is not clinically relevant and that the 2 instruments can be considered interchangeable.…”

“…Most previous studies compared the repeatability and reproducibility of corneal measurements of a few instruments only. 21,22 Our aim was to comprehensively assess the intraoperator repeatability, interoperator and intersession reproducibility, and agreement of ACD measurements using the Pentacam (Scheimpflug device), Sirius (Scheimpflug-Placido device 1), Galilei G2 (Scheimpflug-Placido device 2), and Visante (AS-OCT device).…”

Measurements of anterior chamber depth, white-to-white distance, anterior chamber angle, and pupil diameter using two Scheimpflug imaging devices

“…Salouti et al (13) , compared the ACD measurements from volunteers using the Galilei and Pentacam HR systems, concluding that the differences between these devices were within clinically acceptable levels (the highest mean difference and limits of agreement widths being 0.02 ± 0.01 mm and 0.23 mm, respectively). However, Aramberri et al (19) , concluded that single and dual Scheimpflug camera systems produced significantly different ACD measurements, with the mean difference and confidence interval being 0.10 ± 0.05 mm and 0.04 mm, respectively.…”

“…The Pentacam HR (Oculus, Wetzlar, Germany) and the Galilei G4 (Ziemer, Switzerland) are two clinical tomographers that are both based on Scheimpflug cameras. Beside corneal parameters, these devices also have the ability to measure the ACD, ACA, PD, and ACA, and they (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) or WTW distance (20)(21)(22) . However, to our knowledge, a side by side comparative study has not previously been reported.…”

Clinically relevant biometry

“…[20, 22, 35–38] Salouti et al[22] compared ACD readings obtained by Lenstar LS 900, IOLMaster, and A-mode biometry. The ACD measurements obtained by IOLMaster were slightly smaller than those obtained with other devices, demonstrating 3.14 ± 0.40 mm (range: 2.30 to 4.27mm) with A-mode biometry; 3.07 ± 0.42 mm (range: 2.10 to 4.16mm) with IOLMaster; 3.17 ± 0.42 mm (range: 2.19 to 4.51mm) with Lenstar.…”