CASIA2: Anterior Segment 3D Swept-Source OCT

CASIA2 in a swept-source optical coherence tomography (OCT) anterior segment tomographer. It achieves deep penetration and provides wide-field images by means of a high scanning speed (50,000 scans/s) with a light source 1310 nm wavelength, and it can acquire high-quality 3D images from the anterior surface of cornea to the back surface of the crystalline lens. The clinical application includes pre-operative screening to measure corneal total astigmatism, higher-order aberrations, topography maps as well as 3D analysis of the crystalline lens geometry giving values for front and back surfaces, tilt, and decentration. Axial length and corneal power measured with the OA-2000 biometer can be automatically transferred to CASIA2 for intraocular lens (IOL) power calculation.