OS 4™

The OS 4 surgical platform uses the laws of physics and fluidics to make eye surgery safer, easier and more efficient than it has ever been. The core piece of the device is the three-pump system with vacuum and flow control and the innovative SPEEP pump that ensures highly precise manoeuvres. All instruments are perfectly integrated into the system: cutting-edge LED technology provides for optimum visualisation, the continuous flow cutter ensures traction-free vitreous body removal, and the fully integrated 532 nm endo laser opens up new possibilities in laser control. Making the difference – with the OS 4 by Oertli.

Are you ready for the next generation?

The new OS 4 marks the beginning of the next generation of retinal, glaucoma and cataract surgery. Oertli's all-in-one platform has received numerous other exciting features that provide even more user comfort, precision and safety. Never before has technology in ophthalmic surgery been so sophisticated, versatile, efficient and powerful.

Do you want to know more?

The platform for all cases

The OS 4 by Oertli is a powerfully efficient all-in-one platform for cataract, glaucoma and vitreoretinal surgery. As a versatile and user-specific OR device, the OS 4 works as the extended hand of the surgeon and carries out his orders and intuitions perfectly.

cataract Glaucoma Vitrectomy

SPEEP - speed and precision

The SPEEP pump* offers you more efficiency and precision in your cataract surgery through its precise control of flow and vacuum. With the SPEEP pump, you are given a highly effective tool for even easier, safer and more efficient work in your daily surgical routine.

*Modulation according to the principle of the peristaltic pump

more about the SPEEP pump

The power of fluidics

Fluidics can create excellent results, particularly in vitrectomy and in phaco surgery, provided one knows how to master fluidics. Oertli has proved itself as the innovative leader in this sector, which is best demonstrated by its SPEEP pump. The pump system is similar to the peristaltic pump, yet makes use of the advantages of vacuum control. In SPEEP pump, the vacuum is controlled by the surgeon while the flow is held within preset limits. This results in controlled holding power, high efficiency, optimum flow – and thus perfectly precise work in the anterior and posterior segments.

more about fluidics

The powerful pedal

The wireless dual-linear OS 4 pedal provides surgeons with a highly sensitive and powerfully efficient control. The pedal comes close to being an ankle joint that absorbs all movements of your foot in a fatigue-free manner. Moreover, it is a reliable control centre with six auxiliary switches, and you can define their commands yourself. The modern multifunctional pedal allows comfortable and independent work while boasting intuitive navigation throughout all surgical steps. Boasting a runtime of up to 50 hours, the integrated high-performance batteries ensure sufficient efficiency for several working days.

more about the pedal

Three-pump system for highest precision

The innovative pump technology with vacuum and flow control is the heart of the OS 4. The three-pump system does not only offer the advantages of a Venturi or a peristaltic pump but also boasts the unique SPEEP pump. The system ensures controlled flow and controlled vacuum at the same time. In their finest form, flow and vacuum become a dynamic tool ensuring unsurpassed precision in surgery. In the anterior segment, perfection is achieved by means of easyPhaco, in the posterior segment, the Caliburn trocar cannula system and the continuous flow cutter make perfection possible. Only one cassette is necessary for all functions and all pump systems, which facilitates and accelerates OR processes even further.

more about the pump system

easyPhaco technology

easyPhaco – Fluidics based on physics

The easyPhaco technology has been developed for safe and efficient phacoemulsification. Thanks to Oertli's unique fluidic concept, easyPhaco allows a direct fragment followability and provides a strong fragment holdability. The occluded fragments absorb the U/S energy and are then aspirated efficiently without clogging. The seven times higher infusion capacity allows a constant intraocular pressure for a stable anterior chamber. easyPhaco is available for incisions from 1.6 mm to 2.8 mm.

more about easyPhaco

HFDS® for modern MIGS surgery

HFDS stands for High Frequency Deep Sclerotomy. In micro-invasive glaucoma surgery (MIGS), HFDS creates direct access from the anterior chamber to the Schlemm’s canal and further into the sclera. The resistance of the trabecular meshwork is thus bypassed. The HFDS glaucoma tip is inserted through 1.2 mm paracentesis and, by means of diathermy output, it creates six small sclerotomy pockets in the iridocorneal angle, ensuring improved outflow of aqueous fluid.

more about HFDS

Simple and safe operation

Irrespectively of whether it is cataract surgery, vitreoretinal surgery or glaucoma surgery – interventions need to be performed safely, easily and efficiently. At the core of the OS 4 surgical platform therefore lies absolute user-friendliness. The 15-inch touchscreen reacts precisely, menu navigation is easy and intuitive, the surface is clearly arranged. This way, OR personnel can reliably and effectively assist the surgeon. User-friendly voice confirmations in five individually adjustable languages (English, German, French, Italian, Spanish) ensure focused and autonomous work throughout the entire surgery. All connections are at the front and at the same operational height. The cassette is inserted automatically. Following a switch-on time of about 5 seconds, the system is ready for start.

more about the operation

Power LED technology

Good vision for the surgeon is essential in vitreoretinal surgery. At the same time, the eye should be strained as little as possible. The light sources that are used in eye surgery are LED, xenon, halogen and metal halide. Thanks to the new Power LED, the light output in the OS 4 has been increased by an additional 45 percent - for perfect illumination and visualisation during all manoeuvres, extending to the periphery. The colour spectrum of the second light source – the Power LED Plus – is individually adjustable. Yellow and blue can be mixed easily and to any extent you desire. This brings about high-resolution contrast viewing where the finest tissue structures can be visualised.

more about the Power LED technology

Perfect laser integration

The OS 4 offers a fully integrated 532 nm endo laser of Swiss production. The laser is ready for operation within the shortest time possible and can be controlled directly by means of the dual-linear pedal. This does provide more user-friendliness, a simplified set-up and savings of space and time. Oertli offers a wide range of laser probes suited for the endo laser – straight, curved, directional and steerable. The new fully automated laser user protection filter enables active monitoring and ensures reliable eye protection during laser treatment at the microscope.

more about the laser integration

Accessories of unique quality

As all Oertli devices, the OS 4 surgical platform is a closed system that does not only comprise perfectly suited instruments but also tailor-made device accessories. The large foldable instrument table offers a lot of space and can easily be put aside if you do not use it. The transparent protective cover ensures that the OS 4 is well protected from dust and dirt.


With the OS 4, everything that matches comes together. This applies to instruments to a particularly high degree. All instruments are optimally integrated into the surgical system. The hand pieces of high-quality titanium are ergonomic master achievements that demonstrate tailor-made perfection in every respect. The incredibly sharp Caliburn trocar systems ensure excellent wound tightness. And, easyPhaco is a success story for itself.

more about the instruments

    «Working with the OS 4 has several advantages for me, especially in the posterior segment with 27G: The infusion line is easy to click-on and does not dislocate, the flow stabilizes the eye even with higher vacuum rates and the instruments have superior stiffness. The speed of silicone oil injection/extraction is mind blowing. But what I like most is the footswitch: not only is the laser integrated, it also allows me to change the light settings with my pedal to enhance visibility and play with the contrast. My absolute favourite feature of the pedal is the luxury of being able to switch between fluid and air (and back, and back again...) with my foot.»

    Prof. Dr. med. Kai Januschowski
    Eye clinic Mount St Peter Trier, Germany

    «The OS 4 was my first vitreoretinal surgical platform with which I have progressed. Simultaneous control of both vacuum and flow with SPEEP provides excellent stability and minimizes intraocular pressure fluctuations. Solutions for fluidic control, safety and cutting efficiency in Oertli's platforms allow rapid, secure and continuous progress for both junior and expert vitreoretinal surgeons. The flexible chandelier gives good intraocular illumination in all surgical situations and permits precise maneuvers in bimanual surgery.»

    MD Anis Mahmoud
    Taher Sfar University Hospital, Mahdia, Tunisia

    «I’m working with different Oertli surgical platforms for more than 20 years. In contrast to other platforms, it’s like working with your best friend. You can trust not only in routine cases but in every challenging and complicated surgical situation. Performance, safety, ease of use and continuous innovation are unique!»

    Dr. Karsten Klabe
    Breyer, Kaymak & Klabe Augenchirurgie, Düsseldorf, Germany

    «Open for innovation, dedicated to precision: the secret behind an industrial-clinical partnership in eye surgery.»

    Prof. Matthias Bolz
    Kepler Universitätsklinikum, Linz, Austria

    «I started using the Oertli OS 4 for my phaco after shifting to the UAE. I find them to be a class apart in the management of both hard and soft cataracts. The chamber stability is solid and the bent I/A tip eliminated the need for any additional incisions for bimanual I/A. Personally, I am very happy with the machine and would recommend it to both beginners and experts alike while considering the safety profile and the speed at which it helps you complete the surgery.»

    Dr. Sherren Raveendran
    Ain Al Khaleej Hospital, Abu Dhabi, United Arabian Emirates

    «Safety, control and simplicity of use define the parameters I use when it comes to choosing a medical device. Oertli OS 4 cutting edge design built on time tested traditional features gives me that confidence when operating on challenging cataracts and performing vitreoretinal surgery. This is enhanced by excellent manufacturer’s support. Thanks to its user friendly design, it is also an excellent machine for training junior surgeons.»

    Dr. Manzar Saeed
    Queen Elizabeth Hospital, King's Lynn, Norfolk, England

    «I have been performing vitreoretinal surgeries for decades. Oertli machines have always accompanied me reliably from the very beginning. Regular service supports the longevity of the equipment. The OS 4 combines high-tech developments with sophisticated design and enormous user-friendliness. The touch screen is clear and glare-free due to the dark background. The wide range of setting options offers every surgeon – whether beginner or experienced – the desired parameters. This makes it possible to learn and perform all surgeries with great safety.»

    PD Dr. Ulrike Stolba
    Eye Department Rudolfstiftung, Vienna

    «The OS 4 brings unique features on traction-less vitrectomy, combining peristaltic and Venturi aspiration.»

    Dr. Hugo Quiroz-Mercado
    Hospital Médica Sur, Tlalpan, Mexico

    «Being powerful, efficient and safe is the deceptively simple mix that Oertli offers in its futuristic product I routinely use.»

    Dr. Khaled Mourad
    Elminiya University Hospital, Cairo, Egypt

    «I have been using the Oertli OS 4 for the last few years in most of my cataract surgeries. I am impressed by the stability of the chamber and the effectiveness in nucleus removal. It is a reliable phaco machine.»

    Dr. Toufic Farah
    Family Medical Center, Centre Hospitalier du Nord, Beirut, Lebanon