Ars Technica tests the Tobii EyeX while playing Deus Ex. Video edited by Jennifer Hahn. (video link) During Ars' review playthrough of the latest adventure in the Deus Ex series, I spied a curious option tucked into its Windows menus: "Tobii eye-tracking." None of Square Enix's press materials mentioned such a thing, which seemed strange for a series that revolves around human augmentation and sci-fi upgrades.