Comparative Analysis of Anterior Segment Measurements: A Study Between IOLMaster 700 and Sirius Devices
Seyed Hashem Daryabari1 , Seyyed Morteza Hosseini Imeni2 *
- Baghiatollah University of Medical Sciences, Tehran, Islamic Republic of Iran
- Shahid Beheshti University Of Medical Sciences
Abstract: To evaluate the agreement between the IOLMaster 700 swept-source optical coherence tomography (SS-OCT) biometer and the Sirius Scheimpflug-Placido topographer for measuring anterior segment parameters in healthy eyes
Methods: In this prospective study, 112 healthy eyes of 112 patients underwent anterior segment measurements using both the IOLMaster 700 and Sirius devices. Central corneal thickness (CCT), anterior chamber depth (ACD), keratometry readings (K1, K2, and average), white-to-white (WTW) distance, and cylinder measurements were compared between the two devices. Agreement was assessed using paired t-tests and Bland-Altman analyses.
Results: No significant differences were found between the two devices for CCT, ACD, average keratometry, K2, and cylinder measurements (p > 0.05). However, the IOLMaster 700 provided significantly lower K1 values at the 3mm zone compared to the Sirius (mean difference: -0.14 ± 0.51 D; p = 0.005) and yielded significantly smaller WTW measurements compared to the Sirius horizontal visible iris diameter (HVID) (mean difference: -0.11 ± 0.48 mm; p = 0.018).
Conclusion: The IOLMaster 700 and Sirius devices demonstrate good overall agreement for most anterior segment parameters in healthy eyes, except for K1 measurements at the 3mm zone and WTW values. Clinicians should be aware of these differences when using the devices interchangeably in clinical practice.
