Manufacturer: Shanghai MediWorks Precision Instruments Co., Ltd.

Technology: Rotating Scheimpflug imaging system for comprehensive anterior segment analysis
Core 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