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Ophthalmic / Slit Lamp Microscope S390L (Firefly)

S390L (Firefly) Slit Lamp Microscope

Meibomian glands photography &Auto AI analysis Better optical performance Built-in yellow filter Simple capture every key moment

ophthalmic slit lamp

Simple Design + Simple Operation

The design of the ophthalmic slit lamp S390L(Firefly) was inspired by the shape of the firefly. The smart design largely saves space for clinicians compared to 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 OD/OS Indicator

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High Sensitivity

The slit is still clear and sharp under weak light.

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Wide Dynamic Range

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

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Orthokeratology Lens Fitting


HD Optical System

Optical resolution is up to 2700·N lp/mm
(200 lp/mm), providing more details of the pathologies.


Built-in Yellow Filter

Built-in yellow filter along with cobalt-blue filter increases the contrast of Sodium Fluorescein Staining image.Increase positive rate of early corneal epithelial staining.

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The Meibomian Glands Examination

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Software Features

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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.

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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.

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The Most Effective Tools for Dry Eye


Meibomian Gland Observation

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


Tear Film Breakup Time

High-performance digital module, doctors can get the tear film breakup 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 Magnification6.3 x, 10 x, 16 x, 25 x, 40 x
Optical Resolution2700·N lp/mm (200 lp/mm)
Eyepieces12.5 x
Angle between Eyepieces10°
Pupillary Adjustment52 mm ~ 80 mm
Diopter Adjustment- 8 D ~ + 8 D
Field of ViewØ36.2 mm, Ø22.3 mm, Ø14 mm, Ø8.9 mm, Ø5.7 mm

Slit Illumination
Slit Width0 ~ 14 mm continuous (slit becomes a circle at 14 mm)
Slit Length1 ~ 14 mm continuous
Aperture DiametersØ14 mm, Ø10 mm, Ø5 mm, Ø3 mm, Ø2 mm, Ø1 mm, Ø0.2 mm
Slit Angle0°~180°
Slit Inclination5°, 10°, 15°, 20°
FiltersHeat-absorbing filter, ND filter, Red-free filter, Cobalt Blue filter,Yellow filter built-in
Luminance≥ 150 klx

Power Supply
Input Voltage~ 100 V ~ 240 V
Input Frequency50 Hz / 60 Hz
Rated current1.2 A
Output VoltageLED 3 V, Fixation 15 V

Dimension740 mm x 450 mm x 530 mm(L/W/H)
Gross weight23 kg
Net weight17 kg

System Specifications
Image Sensor12 M Pixels
Photo Resolution4056 x 3040
Video Resolution2592 x 1944
Frame of Video30 fps
Video FormatsMP4 H.264
Exposure ModeAutomatic exposure
Transmission InterfaceUSB

Computer Specifications
PC configurationi5 - 10500T 8GB memory 256GB SSD + 1TB storage
Display1920 x 1080 23.8 inch
PC systemWindows 10