CASIA 2


Tomey Casia 2 anterior segment OCT

Abstract

The Tomey CASIA 2 is a high-resolution anterior segment OCT system utilizing swept-source technology at 1310 nm wavelength, delivering 50,000 A-scans/second with 10 μm axial resolution across a 16 mm imaging diameter.

Core Technology & Specifications

Imaging Technology: Fourier Domain Swept-Source OCT at 1310 nm wavelength

Technical Performance:

  • Axial Resolution: 10 μm

  • Transverse Resolution: 30 μm

  • Scan Speed: 50,000 A-scans per second (improved from 30,000 in CASIA SS-1000)

  • Scanning Depth: Approximately 13 mm

  • Imaging Diameter: 16 mm diameter

Measurement Capabilities

Anatomical Coverage: Can acquire high-quality 3D images from the anterior surface of cornea to the back surface of the crystalline lens

Key Parameters Measured:

  • Central corneal thickness (CCT)

  • Anterior chamber depth (ACD)

  • Anterior chamber width (ACW)

  • Anterior chamber volume (ACV)

  • Keratometry measurements

  • Iris curvature (ICURVE)

  • Iridotrabecular contact (ITC)

  • Lens vault measurements

  • 360° anterior chamber angle measurements with automatic scleral spur detection

Clinical Applications & Advanced Features

STAR Analysis - Glaucoma Application: Automatically measures the anterior chamber angles all around the anterior segment with automatic scleral spur detection, providing specific parameters needed to detect and treat glaucoma

Specialized Analysis:

  • Comprehensive corneal analysis with layer detection

  • Glaucoma angle analysis (360°)

  • Cataract surgery planning

  • Pre/post-surgical monitoring

  • IOL positioning assessment

Performance Advantages

Speed & Automation: Provides impressive user experience with intuitive operation and automation, supported by unbelievable measurement speed

Image Quality: Produces the highest resolution and clarity of cross-sectional images with many details of corneal structure and layers

Enhanced Penetration: Achieves deeper penetration and wider imaging by adopting higher scanning speed light source with 1310 nm wavelength

Clinical Validation

The CASIA 2 has been extensively validated in peer-reviewed studies for:

  • Anterior segment parameter reproducibility

  • Glaucoma angle assessment accuracy

  • Pre/post-surgical monitoring in angle-closure suspects

  • Comparative studies against other leading OCT platforms

The CASIA 2 represents a significant advancement in anterior segment OCT technology, offering superior resolution, faster scanning, and comprehensive automated analysis capabilities for complex anterior segment pathology assessment.