The EyeLink 1000 Plus is the world’s most precise and accurate video-based eye tracker, sampling binocularly at up to 2000 Hz. It is highly customizable, with multiple mount options, interchangeable lenses, and head-fixed and head-free tracking modes. This versatility facilitates eye-tracking across a wide range of experimental setups and participant groups, from infants to the elderly and non-human species too. It also enables integration with EEG, fMRI, MEG, ECoG, and other devices.