Nobel-inspired milestones in eye tracking research

Every December, the world turns its eyes to Sweden as the Nobel Prize celebrates the scientific breakthroughs that have reshaped how we understand ourselves, our planet, and the universe.

For more than a century, the Nobel Prize has stood as one of the most respected institutions in global science — honoring transformative discoveries, elevating pioneering researchers, and sharing the impact of their work with a worldwide audience. It is a tradition that Swedes are deeply proud of: a celebration not only of scientific excellence, but of the belief that knowledge should inspire, inform, and benefit all of humanity. 

In that same spirit, Tobii is marking Nobel Day by shining a spotlight on landmark scientific contributions within our own field: The study of eye movements and the advancement of eye tracking technology.

Today, we want to highlight groundbreaking research that has expanded our understanding of human cognition, perception, and interaction — discoveries that continue to shape industries, enable innovation, and improve lives. 

Just as the Nobel Prize brings attention to science that matters, we aim to celebrate the eye tracking research that has helped the world see human behavior in a new light. 

Guy Thomas Buswell’s contributions to understanding task-dependent eye movements 

Why it is important: 

Guy Thomas Buswell was one of the earliest researchers to systematically investigate how viewers’ goals and instructions shape their eye movements, decades before the technology of modern eye tracking. Working in the 1920s and 1930s, he developed film-based methods to record gaze while participants viewed
paintings, photographs, and text. His careful experiments demonstrated that eye movements are not solely determined by visual features, but instead reflect the viewer’s task, questions, and interpretive intentions. 

Key contributions: 

• Showed that different instructions produce distinct gaze patterns when observers view the same image — for example, “study the picture,” or “describe the action”, etc.  

• Demonstrated that eye movements reveal cognitive strategies: The sequence and duration of fixations depend on what information the viewer seeks. 

• Identified systematic differences between free viewing, analytical viewing, and memory-oriented viewing, highlighting the role of mental set. 

• Established early methods for visualizing scan paths, enabling interpretation of how attention unfolds over time. 

• Provided some of the first empirical evidence that eye movements can indicate what a person is thinking about, not just what they are looking at. 

Impact: 

Buswell’s research laid the groundwork for later cognitive theories of eye movements by showing that gaze behavior is deeply influenced by task goals, meaning, and interpretation. His work anticipated and influenced the later, more widely known demonstrations by Yarbus, and it established the enduring principle that eye movements reflect both visual and cognitive factors. His findings continue to inform research in vision science, education, art perception, and human–computer interaction.

Scott MacKenzie’s contributions to Fitts’ Law and eye tracking — based usability research 

Why it is important: 

Scott MacKenzie is one of the most influential modern researchers in human–computer interaction and input device evaluation, and arguably the single most central figure in formalizing and extending Fitts’ Law within the context of digital interfaces. His work established rigorous experimental methods and mathematical models that link visual attention, eye movements, and motor performance in pointing tasks across multiple device types. 

Key contributions: 

• Modernized and validated Fitts’ Law for HCI by designing experiments that applied the model to mice, touchpads, joysticks, styli, and later to gaze-based interaction techniques. 

• Developed standardized testing methodologies (e.g., ISO 9241-9) that made pointing-device comparisons reproducible across labs and industries. 

• Demonstrated how visual attention precedes motor action, showing that eye movements can predict pointing performance and influence speed–accuracy trade-offs. 

• Extended Fitts’ Law to multi-dimensional tasks and text entry, helping unify UX research under a common quantitative framework. 

• Conducted pioneering studies that used eye tracking as both an input modality and a measurement tool, revealing the coupling between gaze behavior and user strategy in interactive tasks. 

Impact: 

MacKenzie’s work transformed Fitts’ Law from a motor-control model into a cornerstone of usability science, enabling quantitative and cross-device comparisons that underpin modern UX evaluation. His research established eye tracking as a precision instrument for understanding interaction, influencing interface design, accessibility technologies, mobile UX, and emerging gaze-based systems in AR/VR. His methods and models are now foundational in academic research, industrial usability labs, and international standards. 

Looking ahead: Eye tracking’s enduring role in science 

Eye tracking has evolved from early film-based methods to cutting-edge technology that continues to shape research and innovation. As Nobel Prize celebrations remind us of the power of discovery, Tobii remains committed to advancing tools that help scientists, designers, and educators see the world — and human behavior — in new and transformative ways.