Abstract: A liquid lens controlled by an interdigital electrode made of two insulated wires includes an inner core cavity body, the two insulated wires, a first transparent body, a second transparent body, a first fluid, and a second fluid. The insulated wires are arranged side by side and longitudinally winded on the inner core cavity body; the insulated wires are configured to form an interdigital electrode on a sidewall of the inner core cavity body; the first transparent body is disposed at an upper end of the inner core cavity body and the second transparent body is disposed at a lower end of the inner core cavity body; a lens cavity is defined among the inner core cavity body, the first transparent body, and the second transparent body; the first fluid and the second fluid are immiscible, and disposed in the lens cavity.