A vision system for a vehicle includes a camera having an imager and a lens. The camera is disposed at an exterior portion of a vehicle and has a field of view exterior of the vehicle. An air flow element has an inlet port and an outlet port, with the outlet port configured to direct air flow in front of the lens to direct debris away from the lens. The outlet port is configured to direct air flow at a velocity that is greater than a velocity of air flow that is flowing into the inlet port. The inlet port may have an inlet area that is substantially greater than an outlet area of the outlet port. The system may include an air flow generating device for generating or enhancing air flow through the air flow device.