How to use screen-based eye trackers beyond standard desktop setups

Screen-based eye trackers, often referred to as remote eye trackers in research literature, are often associated with standard monitor-based studies. However, many research questions go beyond that setup. In simulation research, human factors, and usability work, researchers may need to study large displays, dual-monitor setups, mobile devices, control interfaces, or simulator environments where a standard desktop workflow is not enough.  

In these cases, it is not only about how eye tracking can help answer the research question, but which type of setup makes the most sense. For some studies, wearable eye tracking is the better choice. For others, a remote setup can provide stronger data quality, cleaner screen capture, and a more controlled way to study how participants interact with screens and fixed interaction areas. 

This article looks at when a remote setup is worth considering beyond the desktop, what determines whether it will work, and what researchers should think about before setting one up. 

When does a remote setup make sense beyond the desktop? 

A remote setup can be a strong choice when the task happens on a defined surface, such as a screen, a larger display, or a fixed physical interaction area, even if the environment itself is more complex than a standard desktop study.

That can include studies involving: 

• Large or wide displays  

• Multi-display environments  

• Simulators  

• Control-room interfaces  

• Mobile devices in controlled conditions  

• Physical interfaces captured with a scene camera or capture workflow  
   

In these situations, a screen-based setup can offer advantages that are difficult to achieve with wearables alone, such as: 

• High output quality and AOI precision are important  

• The participant should not wear any equipment  

• The setup needs to remain unobtrusive for longer periods  

• The study depends on precise digital capture of the interface being viewed  

Remote setups and wearables solve different problems. 

Remote eye trackers and wearable eye trackers are suited to different kinds of research.  Wearables are often the better choice when participants need to move naturally through a space, when the environment is less controlled, or when setup speed is the main priority. Remote setups usually require more preparation, but they can offer clear advantages like those described above 

That difference is particularly relevant in simulation and human factors research, where the environment may be complex but the task is still often structured around screens or a fixed interaction area. 

What makes a setup “advanced”? 

A standard remote workflow is one where Tobii Pro Lab connects directly to the display being studied, calibration runs on screen, and gaze is mapped directly to screen coordinates. An advanced setup is one where the display or environment cannot be handled in that standard way. 

Common examples include: 

• Scene camera setups: where the study captures a fixed interaction area, such as multiple screens or physical controls, rather than a directly connected screen  

• Capture card setups: where video from an external device is brought into Pro Lab as a stimulus source  

The real question is geometry, not screen size 

One of the most important things to understand is that setup feasibility is usually not about screen size alone. It is about geometry. 

What matters most is: 

• The participant’s distance from the tracker  

• The tracker’s maximum gaze angle  

• Whether the full viewed area falls within the tracker’s coverage  

• How the surface is captured in the workflow  

• Whether final required participant-to-interaction area distance still allows the study task to be performed naturally

This means that large monitors, TVs, kiosk displays, and simulator screens can all be viable if the geometry works. In many cases, the deciding factor is whether the participant can sit at the right distance and whether the tracker can cover the required area from that position.  

If Tobii Pro Lab can connect directly to the display, the workflow may still be relatively simple. The extra complexity comes in when the setup requires a scene camera or capture card. 

Tobii Pro Spark or Tobii Pro Fusion? Choose for the setup, not the spec sheet 

Once a screen-based setup looks like the right direction, tracker choice becomes a practical question rather than a purely product-driven one. 

A key difference between Tobii Pro Spark and Tobii Pro Fusion is their gaze angle and sampling rate: 

• Tobii Pro Spark has a wider maximum gaze angle at 35 degrees, which gives it broader coverage at a given distance  

• Tobii Pro Fusion has a narrower maximum gaze angle at 30 degrees, but a higher sampling rate up to 250 Hz compared with Spark’s 60 Hz  

In practice, this means Tobii Pro Spark is often a strong fit or large screens, wide areas, and multi-display environments. Tobii Pro Fusion can be the better choice when the study requires higher accuracy or higher sampling rates, for example to measure fast eye movements such as saccades or to estimate any eye movement onset more precisely. 

The right choice depends on both the practical demands of the setup and the experimental requirements of the study. Wider coverage, higher accuracy, and higher temporal precision support different research needs. 

How do you know whether your setup will work? 

Before building a non-standard setup, researchers usually need to answer a few practical questions: 

• Will the tracker cover the full interaction area?  

• Does the participant need to sit farther back?  

• Which screen-based eye tracker would be the better fit for the setup? 

• Will the expected accuracy be good enough for the size of the interface elements being studied?  

An eye tracker geometry calculator can be used as a planning aid to explore these questions before testing begins. It can help researchers compare tracker coverage, understand how participant distance affects usable area, and judge whether a proposed setup is realistic. 

The calculator is most useful as a starting point. That does not replace real testing, but it does help move the discussion from vague assumptions to a more structured assessment of feasibility. 

Try out the tool: Eye tracker geometry calculator.

Disclaimer: The eye tracker geometry calculator is a practical planning aid created to help explore eye tracking setup feasibility. It is not an official Tobii product tool and should be used as a guideline only. Always test and validate the setup in the real environment before running a study.

Final thoughts 

Remote eye tracking is often treated as a tool for standard desktop studies only. In practice, it can support a much wider range of research setups. 

For researchers working with simulation, large displays, mobile testing, or other non-standard environments, the key question is whether the study would benefit from the strengths of a remote workflow and whether the geometry and configuration make that workflow feasible.  

When those conditions are met, remote eye tracking can be a strong option for studies that go well beyond a standard single-monitor setup.

Related set-up guides

• How to configure an advanced display set-up

• How to record an advanced screen setup in Tobii Pro Lab

• How to configure Tobii Pro Lab for the Tobii Pro Mobile Testing Accessory