J Korean Ophthalmol Soc.  2022 Jan;63(1):10-19. 10.3341/jkos.2022.63.1.10.

Comparison of Anterior Segment Measurements between Scheimpflug-Placido Camera and New Swept-source Optical Coherence Tomography

• Choe GS
• Kim KY

• KMID: 2524933
• DOI: http://doi.org/10.3341/jkos.2022.63.1.10

Abstract

Purpose
We compared anterior segment measurements obtained using a Scheimpflug-Placido topographer (SIRIUS^®, Costruzione Strumenti Oftalmici, Florence, Italy) and a new anterior module for a swept-source optical coherence tomography system (ANTERION^®, Heidelberg Engineering Inc., Heidelberg, Germany).
Methods
Anterior segment measurements were evaluated in 74 eyes of 101 patients with the two devices. Central corneal thickness (CCT), anterior chamber depth (ACD), corneal refractive power (K), J0 (Jackson cross-cylinder with axes at 180° and 90°), J45 vector (Jackson cross-cylinder with axes at 45° and 135°), and white-to-white corneal diameter (WTW) measurements obtained using the SIRIUS^® system and the new anterior segment module of ANTERION^® were compared.
Results
The mean CCTs measured by SIRIUS^® and ANTERION^® were 558.69 ± 44.65 and 540.26 ± 36.57 μm, respectively. The difference was statistically significant (p < 0.005), and there were high correlations between the two methods (r = 0.915, p < 0.001). The mean ACD measurements were 3.34 ± 0.53 and 3.34 ± 0.51 mm (p = 0.856), respectively, for SIRIUS^® and ANTERION^®. The measurements were strongly correlated (r = 0.966, p < 0.001). The measurements of WTW, total mean K, and J0 obtained with the two systems differed significantly (p < 0.005, p = 0.017, and p < 0.005, respectively), with high correlations between the two systems (r = 0.875, r = 0.967, and r = 0.933, respectively; all p < 0.001).
Conclusions
There were significant differences in measurements of K, CCT, WTW, and J0 between the two devices. Agreement analysis suggests that SIRIUS^® and ANTERION^® should not be used interchangeably.

Keyword

Anterior chamber depth; Central corneal thickness; Corneal refractive power; Swept-source optical coherence tomography