Materials and Methods: A total of 196 eyes of 100 children with no ocular pathology other than refractive errors were included in the study. The anterior segment parameters of all cases were performed using Sirius and IOL-Master devices. Flat keratometry (K1), steep keratometry (K2), central corneal thickness (CCT), anterior chamber depth (ACD), and pupil diameter (PD) were recorded and evaluated.

Results: The measurements of K2, CCT, ACD, and PD were significantly different between the devices (p<0.05). The mean flat keratometry (K1) values were 42.99±1.44 D and 42.98±1.41 D in Sirius and IOL-Master 500, respectively (p=0.841). The mean K2, ACD, CCT, and PD measurements were significantly higher in IOL-Master. Notably, the two devices exhibited significant noninterchangeability with respect to pupil diameter measurements, showing a mean difference of 1.306 mm and 95% limits of agreement between -1.42 and -1.183 mm.

Conclusion: Sirius and IOL-Master devices can be used interchangeably when evaluating the anterior segment parameters, including keratometry values, CCT, and ACD in children, even though these anterior segment parameters were significantly different between the devices. Keywords : Anterior chamber depth, Corneal thickness, Pediatric, Sirius, IOL-Master