Vision and camoflauged units

According to the wiki: "Camouflaged units are temporarily revealed while nearby and in the line of sight of a champion, are within the vision radius of enemy Control Ward or enemy turret, or if revealed by an effect that grants unit-vision (e.g. some champion abilities, Scryer's Bloom and Arcane Sweeper)." What is "unit-vision"? The wiki only distinguishes two types of vision: normal and true sight. How can I find out if an ability grants "unit-vision"?