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 SPEEPMode 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.


    «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

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

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 SPEEPMode. The pump system is similar to the peristaltic pump, yet makes use of the advantages of vacuum control. In SPEEPMode, 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. 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 SPEEPMode. 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

By making use of fluidics technology, easyPhaco enables immediate aspiration of the lens material and ensures perfect followability. easyPhaco provides unsurpassed chamber stability, efficient fragment aspiration and perfect emulsification. The unique design of the tips ensure unsurpassed chamber stability, while at the same time, incredibly high holdability can be felt. Aspiration of fragments runs efficiently and without any repulsions. Due to its distinct manufacturing quality, the phaco handpiece is incredibly robust and durable.

more about easyPhaco

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. All connections are at the front and at the same operational height. The cassette is inserted automatically. The OS 4 is ready for operation only 15 seconds after it has been switched on.

more about the operation

GoodLight 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. Oertli relies on the LED technology that boast an optimum mixture of visualization, contrast seeing and safety.

more about the GoodLight 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.

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