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Leica M844 Ophthalmic microscope

The M844 belongs to the premium class of ophthalmic surgical microscopes and provides an optimal solution particularly for advanced posterior and anterior segment surgery.



M844 F40_Brochure-CN
M844 F40_Brochure_EN

Premium Ophthalmic Microscope M844 F40
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Crisp and sharp
Leica’s APO OptiChrome M844 optics provide the highest resolution to see even the smallest anatomical details.

APO OptiChrome


Same view, same light
Leica’s QuadZoom gives both the surgeon and assistant 100% of the llumination and the same magnification.

Same view, same light


Enhanced safety for the patient and surgeon
Leica's exclusive direct illumination system offers impressive clarity, contrast and color at safe low-light levels.

Enhanced safety


Leica introduces the original APO OptiChrome
Providing an extraordinary degree of light transmission for maximum detail recognition is critical for all types of ophthalmic microsurgery. For the posterior segment surgeon, where availability of light is limited, a high degree of light transmission is essential. For refractive and anterior segment surgery, low light is always better for the patient.


Expect only the highest standards in optics from the Leica M844

  • Sharper and crisper image
  • Higher light transmission
  • Natural colour fidelity
  • Outstanding depth of focus
  • Higher contrast



Efficient illumination
By utilising four separate beam paths through the same common zoom system, the Leica QuadZoom delivers 100% APO OptiChrome stereovision and 100% illumination for both the main surgeon and the assistant.


2 × 2 views always synchronized
By putting both pairs of beam paths through one common zoom system, as the surgeon changes magnification, the assistant's view is perfectly synchronized with the surgeon's view.

2 × 2 views always synchronized


Low light supports patient and surgeon safety
With two bulbs and two prisms, the Leica M844 creates true three-dimensional illumination. Using a focused, direct illumination system instead of fiber optics, the Leica M844 takes a ray of light and projects a crisp, sharp and homogeneous image even at very low light levels. This combination of direct halogen illumination and highly efficient optical transmission helps protect the eyes of patient and surgeon alike.


See things in a different light
OttoFlex II, an integrated independent illumination system, gives a brilliant red reflex even in low light conditions and enhances the view's contrast. Difficult anatomical conditions, such as small pupils or very advanced cataracts are more easily visualised through this unique system. Continuously adjustable from 4 mm to 35 mm diameter, OttoFlex II places the brightness where the surgeon needs it most.

See things in a different light


Intuitive control unit
The touch panel offers intuitive control of all the Leica M844's functions. The control unit’s operation is simple and straightforward with many innovative features.

Leica Two-in-One display control unit mode (above) and video mode (below)

Leica Two-in-One display control unit mode (above) and video mode (below)


Everyone is an individual
Customised start settings, such as illumination and magnification levels, are easily programmed into the control unit for up to 30 different users. By having a surgeon’s individual settings available at the touch of a button, the microscope is instantly ready for the next procedure and/or surgeon and the workflow of the surgical team is faster and more efficient.


StepCycle for greater efficiency
Different levels of light, focus and zoom can optimize each phase of surgery. Making these adjustments today takes surgeons'precious time. The automatic StepCycle function enables the surgeon to program predefined settings that are used throughout typical surgical procedures. After simple programming, a touch of a button on the foot pedal will activate the microscope's predefined settings, step by step, during the procedure.


Real-time video
With one touch of a button the control unit's display becomes a general use, real-time video monitor, which allows an immediate and convenient view of the current surgical procedure for the operating room staff. For general video viewing there is no need for an extra video cart.

Real-time video


Leica F40 space saving stand with extended net reach
The Leica M844 F40 has a small footprint but long reach which makes it easy to position anywhere around the operating table. Four large, fully pivoting casters and an easy to grasp handlebar make the microscope effortless to transport into and out of position.

Leica M844 F40


Auto Reset and it's ready to go
When the surgeon pushes the swingarm up after each procedure,all the microscope functions automatically reset and the microscope is ready for the next case. A real time saver for the operating room staff and peace of mind for the surgeon.


Focus Lock – for quick movement in and out of the operative site
Focus Lock allows the surgeon to move the microscope in and out of position laterally. With the microscope staying on the same focus plane, the surgeon does not have to waste precious time refocusing to continue his procedure.


Easy side-to-side quick change for the assistant
Changing the assistant's position from one side to the other can be done quickly and easily without removing any parts. Simply lift the main surgeon's binoculars and rotate the assistant's bridge. No parts to drop or damage!

Easy side-to-side quick change for the assistant


The UltraLow III for ideal eyepiece-to-field distance
The UltraLow III binocular eyepiece tubes drop lower than conventional binoculars, which compensates for stacking auxiliary accessories on the optics, such as inverters or laser shutters.The surgeon now works in comfort.


ErgonOptics for individual comfort and concentration
Every surgery requires the highest level of concentration from the surgeon and his or her surgical team. The physical comfort of the surgeon is critical to this concentration. Leica provides a large selection of binoculars and three different objective lens types to meet each individual surgeon's physical requirements. No other
microscope system offers this range of surgeon and assistant binoculars and objective lenses.


Independent choice of wide-angle observation accessories
The Leica M844 is designed to accept the integration of wideangle observation systems or stereo image inverters. Leica Microsystems' own solution, the Leica RUV800 with integrated inverter, gives the surgeon, assistant, and video camera the same upright view of the retina. In addition, when integrating the Oculus SDI/BIOM system, the surgeon can control its functions through the Leica M844's 16-function foot pedal therefore the system can be fully controlled by a single foot pedal instead of two.

Leica RUV800 wide-angle observation system

Leica RUV800 wide-angle observation system


Additional microscope functions at your fingertips
All-brake release and new Focus Lock multi-function are conveniently located on the rotatable handles. If desired, additional functions can be programmed to meet a wide variety of individual surgeon's preferences.

Leica M844 controlling Oculus SDI/BIOM system

Leica M844 controlling Oculus SDI/BIOM system


Wide choice of foot pedals
Leica offers three foot pedal styles to meet the needs of all users. XY, zoom, focus and illumination can be controlled from either the 12-function cross or 12-function long pedals. The 16-function cross pedal gives the user four additional options for individual tasks, such as inverter usage, StepCycle or room light function.Additionally, the surgeon can now choose between a wired or wireless foot pedal.


Leica Wireless Footswitch
Using ISM bandwidth technology, it offers maximum mobility for a fast and easy switch between left and right eye procedures.

Wireless Footswitch


Leica ToricEyePiece
The Leica ToricEyePiece is a cost-effective, easy-to-use, timesaving aid for Toric IOL placement. The rotatable scale is superimposed over the microscope image to help the surgeon find the correct IOL positioning.


Leica ToricEyePiece – the perfect aid for placement of premium IOLs


Leica DI C800 for data display
With the Leica DI C800 head-up display, images from digital sources, providing an XGA signal, can be projected directly into the surgeon's eyepiece. This cockpit-style display can show data precisely where the surgeon needs it.

DI C800

Leica DI C800


Leica Slit Illuminator
The Leica surgical slit lamp, provides full slit functions. The slit beam is adjustable in width and length and can be scanned over the cornea +/-23° from any position via the foot pedal. A retractable blue filter and integrated quick lamp change add to its functionality.

Slit Illuminator

Leica Slit Illuminator


Wide choice of Leica Video Adapters
All Leica video adapters offer an intra operative fine focus. This enables the surgeon to always achieve crisp and clear focus quality in documentation. The surgeon can furthermore choose between manual or remote control (with sterile cover or without).Finally, the c-mount interface allows the connection of a 1/2", 1/3",and HD camera.

cameracamera video adapters


QuadZoom – The ultimate view for everyone
Proper surgical training requires everyone to see the same view.The Leica M844 optical system delivers the same magnification and stereo view simultaneously for both the teacher and the student.A focus override knob on the assistant bridge allows individual fine-tuning separately from the main surgeon.



Two-in-One control unit and video screen
The Leica M844 is equipped with a unique control unit that can be switched to a general use, real-time video monitor during surgery. With camera, camera control unit, and monitor all mounted on the Leica F40 floor stand, there is no need for a separate video cart. The entire surgical team can have the benefit of video for every case. If there is a need for extremely high quality documentation, the staff may choose to connect an additional video monitor to the system.

Two-in-One control unit and video screen


Double wing = three stereo observers

The unique Leica double wing assistant bridge enables the teacher to have two students in full stereo view simultaneously at the same magnification. With the newly integrated video display,all three along with the operating room staff and additional students can observe and learn via the video monitor.

Leica M844 with double wing assistant bridge

Leica M844 with double wing assistant bridge


Documentation for education
All the latest documentation options are available with the Leica M844. The Leica MDRS4 digital recording system, as well as many other commercially available digital video systems can be interfaced. Even classic 35 mm photography can still be done with the Leica M844. All this to ensure ideal documentation capabilities for training the surgical teams of tomorrow.

Electrical data


Power supply

90–265 VAC, 50/60 Hz

Power consumption

400 VA


Class 1


Type B



Magnification changer

APO-Zoom 6:1, motorized, with 4 separate beam paths


3.5× – 21× (WD 175 mm, 10× eyepieces)


APO-chromatic corrected optics

Field diameter

7 mm – 80 mm

Working distance

175 mm, 200 mm and 225 mm

Focus range

54 mm, motorized, with automatic reset


Wide field eyepieces for eyeglass wearers (8.33×, 10×, 12.5×)Dioptric setting +/–5 with adjustable eye cup


Leica OptiChrome™ , WD 175 mm, APOLeica OptiChrome™ , WD 200 mm, APOLeica OptiChrome™ , WD 225 mm, APO, (WD = working distance)



Quick-change lamp mount

With two 12 V / 50 W halogen lamps


IR-barrier filter, UV-barrier filter, two built-in filter holders for optional filters




Floor stand with 4 electromagnetic brakesAlternatives: Ceiling Mount Leica M844 C40 or Telescope Mount Leica M844 CT40


Continuously adjustable gas spring

Maximum load

12.2 kg accessories to the microscope

Maximum reach

1492 mm

Vertical range

846 mm

Minimum transport height

1949 mm

Weight without microscope

Approx. 330 kg


Motorized, movement range 50 × 50 mm, with automatic reset

Tilt mechanism

Motorized, +15°/–50°

Hand switch/Foot pedals

16- or 12-function foot pedal with controls arranged longitudinally or transversely, wired or wireless (optional)12-function hand switch

Control unit

Two-in-one display, control and video display in one. The latest electronic control for the continuous monitoring of all motor functions and the light intensity. Data shown by means of LCD, with adjustable contrast and brightness. Operation by modern touch-panel control. ISUSTM Intelligent SetUp System, menu selection based on unique software for user-specific configuration, with built-in electronic auto-diagnosis and user support. Open architecture for future software developments.



0° assistant attachment

100% Stereopsis at same magnification, including documentation interface, rotatable from side to side(temporal approach), built-in fine focusing, rotatable ring for binocular tube

Double wing

For three observers simultaneously


Leica 2D video systems, Leica MDRS4 digital recording system, Leica Zoom Video Adapter f = 35–100 mm,Manual Video Adapter f = 55/70 mm, Remote Video Adapter f = 55/70 mm Photo / TV Dual-attachment: f = 60/85/107 mm for TV, f = 250/350 mm for 35 mm camera,Phototube f = 250/350 mm

Wide-angle observation

Leica RUV800, BIOM



Laser interface

Interface to fit various commercially available lasers; adapters available from laser suppliers

Slit lamp

Leica, motorized travel +/–23°, Slit width 0.01 – 15 mm, length 3 – 15 mm, Rotatable 180°, quick lamp-changer

IOL placement

Leica ToricEyePiece, the aid for placement of premium IOLs


Leica DI C800 high resolution true digital imaging color module for data display, 1024 × 768 pixel resolution

Binocular tubes

Binocular tubes with variable angles: 0°–180°, 30°–150°, 10°–50° UltraLow™ III, 10°–50°, 5°–25°,and inclined angle 45°


Sterilizable components for all drive knobs, commercially available drapes