CASIA 2
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.
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