(covers information from an alternate timeline)
The tactile interface was a feature of 24th century LCARS panels, which altered the normally flat panels (intended to be read) so that beings with poor eyesight or who were blind could still use the consoles. A Starfleet officer could activate it by telling the computer to "activate the tactile interface."
In an alternate timeline, in 2374, Lieutenant Commander Tuvok was blinded by a detonating chroniton torpedo. As a result, he had to use the tactile interface to use the tactical station of the bridge. (VOY: "Year of Hell")