Eye tracking is used across a broad range of disciplines—from psychology and neuroscience to marketing, political science, and communication—to capture real-time measures of attention and decision-making. Yet the method comes with a distinct layer of technical infrastructure that is often underreported and not fully captured in other preregistration templates. Choices related to calibration procedures, preprocessing algorithms, and other parameters can meaningfully shape the data collected and the conclusions drawn, but are often missing from preregistrations that focus primarily on behavioral