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Slit Lamp Microscopes Dry Eye Series Scansys Anterior Segment Analyzer Hand-held Fundus Camera Portable Slit Lamp Vision Screener Vision Chart Applanation Tonometer Retina Lenses Slit Lamp Accessories
Ophthalmic / Slit Lamp Microscope S390L (Firefly WDR)

S390L (Firefly WDR) Slit Lamp Microscope

Optical resolution increased by 40% Built-in yellow filter The Meibomian glands examination

ophthalmic slit lamp

Simple Design + Simple Operation

The design was inspired from the shape of firefly. The smart design largely saves space for clinicians compared other bulky camera systems.We have preset many camera parameters so the user does not need to adjust settings before using the device. The user can operate the machine immediately once the installation has been finished.
The device has the following automatic functions for photo shooting and processing when equipped with our Mediview software:
- Wide Dynamic Range
- Meibomian Glands Examination
- Auto Exposure
- Auto Gain
- Auto White Balance
- Auto OS/OD Indicator


High sensitivity. The slit is still clear and sharp under weak light.


Wide dynamic range. Iris and sclera images are simultaneously clearly presented with more realistic and evenly distributed color


Optical resolution increased by 40%

High-quality optical microscope with extraordinary resolution to meet doctors' higher optical quality requirements for better accuracy and safe diagnostic results


Built-in yellow filter


The Meibomian glands examination


Convenient Patient Management

The patient management system enables clinicians to build and edit patient record,search information by inputting keywords.
Clinicians can easily record symptoms and manage the data all the time.
The software supports DICOM which makes the images captured by Firefly be easily integrated into hospital's medical system.

Functional Image Analysis

Clinicians can measure the pathology area with our powerful software tools and change the contrast and brightness of the images. Clinicians can also compare several images at one time to analyze the symptoms and pathology.


Orthokeratology Lens Fitting Assistance

The optometrists can capture and record high resolution fluorescein images of lens fitting and real-time video without a recording time limit. By comparing the different lens fitting effects, the optometrist can show and educate patients which lens is most suitable for them.

Customized Auto Exposure Value Setting

Clinicians can customize auto exposure values according to the image demand and save as templates for future capturing purpose.
Also, the printing report can be customized according to clinician's needs.


Meibomian Gland Observation

Built-in infrared light source allows the doctor to accurately judge the absence of the meibomian glands.


Tear Film Break-up Time

High-performance digital module, doctors can get the tear film break-up time and judge the stability of it by high-resolution video recording.


Red Eyes Analysis and Keratopathy Exposure

With a built-in yellow filter, doctors can accurately analyze eye surface damage and inflammation images.


Tear Meniscus Height

Doctors can obtain tear meniscus height by using measuring function in the Mediview software, and effectively evaluate tear
meniscus height.


Microscope TypeGalilean Type
Magnification ChangeRevolving Drum 5 steps
Total Magnification6.3X, 10X, 16X, 25X, 40X
Angle between Eyepieces10°
Pupillary Adjustment52mm-80mm
Diopter Adjustment-8D~+8D
Field of ViewØ36.2mm, Ø22.3mm, Ø14mm, Ø8.9mm, Ø5.7mm

Slit Illumination
Slit Width0~14mm continuous (slit becomes a circle at 14mm)
Slit Length1~14mm continuous
Aperture DiametersØ14mm, Ø10mm, Ø5mm, Ø3mm, Ø2mm, Ø1mm, Ø0.2mm
Slit Angle0°~180°
Slit Inclination5°, 10°, 15°, 20°
FiltersHeat-absorbing filter, ND filter, Red-free filter, Cobalt Blue filter,Yellow filter built-in
Lamp3V LED Module

Power Supply
Input Voltage100V~240V
Input Frequency50Hz/60Hz
Rated current1.2A
Output Voltage3V LED, Fixation 15V

Dimension770mm x 470mm x 570mm(L/W/H)
Gross weight23kg
Net weight17kg

System Specifications
Image Sensor5.0M Pixels
Photo Resolution2592 x 1944
Video Resolution2592 x 1944
Frame of Video25fps
Video FormatsMP4 H.264
Exposure ModeAutomatic exposure
Transmission InterfaceUSB 3.0 TYPE-C