Scansys TA517 3D Anterior Segment Analyzer
Abstract
Scheimpflug-based anterior segment analyzer capturing 28-100 images (up to 384,000 data points) with 8th-order wavefront analysis, AI-powered keratoconus detection, and integrated calculators for refractive surgery, cataract planning, and contact lens fitting.
Manufacturer: Shanghai MediWorks Precision Instruments Co., Ltd.
Technology: Rotating Scheimpflug imaging system for comprehensive anterior segment analysisCore Imaging Technology
Imaging Method: Scheimpflug imaging system
Image Acquisition Options:
- 28 ultra-high-definition Scheimpflug images (107,520 data points)
- 60 ultra-high-definition Scheimpflug images (230,400 data points)
- 100 ultra-high-definition Scheimpflug images (384,000 data points)
Coverage Area: 16mm diameter of corneoscleral area (for scleral lens module with 60-image mode)
Measurement Capabilities
Corneal Analysis:
- Central corneal thickness (CCT) and mid-peripheral corneal thickness (MPCT)
- Corneal curvature measurements
- Anterior and posterior corneal surface topography
- Corneal diameter (White-to-White)
- Eccentricity (ecc) values in different directions (nasal, temporal, inferior, superior, flat, steep) for diameter ranges 2-10mm
- Sagittal height measurements
- Corneal thickness spatial profile (CTSP)
- Percentage thickness increase (TCI)
Anterior Chamber Analysis:
- Anterior chamber depth (ACD)
- Anterior chamber volume
- Anterior chamber angle measurements
- Angle opening distance (AOD)
- Trabecular-iris space area (TISA)
- Kappa angle and alpha angle
Lens Analysis:
- Crystalline lens density analysis (cross-sectional and longitudinal sections via gray value calculation)
Corneal Refractive Power Measurements
- SimK (simulated keratometry)
- Total corneal power
- True net power
- Total corneal astigmatism
- Ratio of posterior to anterior corneal surface curvature radius
Aberrometry
Wavefront Analysis:
- Up to 8th-order Zernike polynomial decomposition
- Analyzed for: anterior corneal surface, posterior corneal surface, and total cornea
- Maximum diameter: 12mm
- Total corneal spherical aberration
- Total corneal higher-order aberrations
Visual Quality Simulation:
- Retinal imaging simulation
- Point spread function (PSF)
- Modulation transfer function (MTF)
Advanced Diagnostic Features
Keratoconus Detection:
- Keratoconus index (KCI) for anterior and posterior surfaces
- SVM (Support Vector Machine) classifier
- Keratoconus probability (KCP) scoring
- Keratoconus grading (Grade 0-IV)
- Refractive 4 Maps analysis
- Case reference database
- Bilateral differential topography algorithm
Fourier Analysis: Decomposes corneal topography into:
- Spherical component
- Decentration component
- Regular astigmatism component
- Irregularity component
Built-in Calculators & Databases
IOL Calculation Formulas:
- Pearl-DGS (optional)
- Jin formula
- SRK-T
- Holladay 1
- Hoffer Q
- Age optimization for astigmatism
- Age optimization for spherical aberration
Contact Lens Fitting:
- Automatic calculation for orthokeratology lenses, soft contact lenses, and RGP lenses
- 3D/2D simulated fitting with fluorescence staining simulation
- Customizable contact lens database
IOP Correction: 5 built-in intraocular pressure correction formulas based on corneal thickness
Database
Global population database: Approximately 3,000 cases (and growing)
Clinical Applications
- Refractive surgery screening
- Refractive cataract surgery planning
- Contact lens fitting (including orthokeratology and scleral lenses)
- Glaucoma screening
- Intracorneal ring segment (ICRS) surgery planning
- ICL (Implantable Collamer Lens) size recommendation and vault prediction/measurement
Visreed