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Ophthalmic / Corneal Topographer DEA520


2 in 1 Ocular Diagnostic Master Corneal Topographer

Corneal Topographer DEA520

1 Ring 3 Illuminations 12 Functions

DEA 520 is a multi-purpose corneal topographer that integrated dry eye and corneal topography analysis.


Placido Ring

Thousands of measure points - ensure more data available and accurate analysis
Smaller cone design - bigger projection area
3 Illuminations - white illumination, infrared illumination,cobalt blue illumination

12 Functions

Dry Eye Diagnosis

● Questionnaire Survey
● Meibomian Glands Function Evaluation
● Conjunctival Redness Analysis
● Lipid Layer Thickness

● Non-Invasive Tear Film Breakup Time
● Cornea Sodium Fluorescein Staining
● Non-Invasive Tear Meniscus Height
● Eyelid Margin


● Topography Analysis
● Aberration & Simulation

● Lens Fitting
● Pupil & Corneal Diameter Measurement

Corneal Topographer DEA520_20230801 - 副本-14.jpg

Built-in computer

Integration design enables maximum treatment room utilization
Dry eye diagnosis and Topography analysis integrated

Doctor-Patient Communication

Visualized diagnosis report, easy to understand
External display connection enables real-time observation

Ergonomic Design

50° adjustable display, easier operation.
Auto eyes recognition,switch illumination and magnification intelligently under various function modes.
Compact cone, specially designed for various orbits.

Clinical Application

Dry Eye Analysis
Cornea Morphology Diagnosis
Aberration & Simulation
Lens Fitting


Dry Eye Diagnosis

Make dry eye visualized

Dry Eye Questionnaire / Ocular Surface Disease Index (OSDI)

The built-in dry eye questionnaire is designed according to the risk factors and clinical characteristics of dry eye, providing a simple preliminary assessment for dry eye, improving diagnosis and treatment efficiency and facilitating patient follow-up.

Corneal Topographer DEA520_20230607-13.png

Non-Invasive Breakup Time

Comprehensive 7 dry eye examinations.

More than 9.6mm diameter Placido ring projection. Auto identify breakup area and analyze NIBUT intelligently.


Meibomian Glands Function Evaluation

Upper Meibomian Glands-contour.png

Automatically anlalyze meibomian glands loss caused by meibomian glands dysfunction with precise and quantified diagnosis results

Corneal Topographer DEA520_20230607-14.png

Auto identify and auto enhance of meibomian glands area

Corneal Topographer DEA520_20230607-15.png

Automatic identification system depicts tear meniscus area and measures the tear height intelligently.

Corneal Topographer DEA520_20230607-16.png

Identify and calculate percentages of conjunctival congestion and ciliary congestions and evaluate severity of eye congestion.

Corneal Topographer DEA520_20230607-17.png

Lipid Layer Thickness

Observe dynamic lipid layer and distribution by video recording compared with standard templates. It’s helpful for judging MGD.

Corneal Topographer DEA520_20230607-18.png

Eyelid Margin

The high resolution image supports zoom in to meet examination requirements of overall shape of eyelid margin and its slight change.

Corneal Topographer DEA520_20230607-19.png

Corneal Fluorescein Staining

Specially designed built-in yellow filter, working with cobalt-blue illumination improves contrast of corneal fluorescein staining images. Effectively increases positive rate of early corneal epithelial staining.

Corneal Topography

Sketch the contours of corneal

Corneal Topographer DEA520_20230607-20.png

Lens Fitting

A simulated fluorescein image will be created based on patient’s cornea. The system will recommend several suitable lens for choose, which accelerates work flow and excludes unfit lens to save the trouble for patient to do real several fluorescein staining.

Research and develop with team SOS from EYE & ENT Hospital of Fudan University. Recommend the most precise lens based on the patient documentation.


Aberration & Simulation

Zernike wavefront aberration analysis makes plan of cataract and refractive surgeries visualized and ensures patient’s postoperative vision quality.

4 Maps

4 maps provide Sagittal Curvature,Tangential Curvature, Elevation Map, Refractive Power, and K1/K2/Km/Astig/Ecc value.

Four Maps.png

Corneal Topographer DEA520_20230801 - 副本-15.jpg


Shape Factor-Ecc.png

Shape Factor


Pupil & Corneal Diameter Measurement


Cases Comparison


Dimension53 cm × 30 cm × 54 cm
Weight12.7 kg
Built-in CPUintel
Hard Disk1 TB
Image Resolution2048 × 1536
Display10.1 ″ touchscreen
IlluminationWhite, Infrared, Cobalt-blue
Internet ConnectionWIFI
Printer ConnectionWIFI, USB
Power Supply100 ~ 240 VAC,50 / 60 HZ
Extension Display InterfaceDisplay Port
OS/OD RecognitionAutomatic
Chin Rest ControlElectrical
Left and Right0 ~ 94 mm work range
Front and Back0 ~ 64 mm work range
Up and Down0 ~ 30 mm work range
LanguageChinese / English / Japanese

Numbers of Rings50 Rings
Diameter of Project Area8.8 mm( 43 D )11 mm( 43 D )
Radius of Curvature32.14 dpt ~ 61.36 dpt ( 5.5 mm ~ 10.5 mm ) Accuracy:± 0.1 dpt ( ±0.02 mm )
Astigmatism Axis0 ~ 180°
White To White6 ~ 17 mm
Pupil Diameter1 ~ 13 mm
Topography FunctionSagittal CurvatureTangential CurvatureElevation MapRefractive Power
4 MapsFour Maps display
Shape FactorEcc, E, p, Q
ZernikeCorneal wavefront aberration,PSF map, MTF curve and Simulated image in different pupil diameters
Examination Result ComparisonSupport 2 results comparison and difference calculation

Dry Eye Analysis
NIBUTAutomatic analysis, tear film rupture area and trend, first break-up time and average break-up time
Tear Meniscus Height0.01 ~ 2 mm
Meibomian GlandsMeibomian glands loss rate and grade
Lipid LayerTemplate match
Eye RednessConjuntival congestion percentage
Eyelid MarginSupport digital images zoom in
Ocular SurfaceBuilt-in yellow filter