Therapeutic ultrasound for eye disorders

A device configured to stimulate an external nasal nerve at the junction of an upper lateral nasal cartilage and a nasal bone of a patient to activate the patient's lacrimal glands at the junction of the upper lateral nasal cartilage and the nasal bone, said device comprising:

• an applicator having a handle and a skin interface, said skin interface having a thickness in a lateral direction between 0.5 mm and 5 mm and a skin contact surface comprising an edge which is curved in a medial direction and rounded in the lateral direction, said edge having a lateral radius in a range from 0.5 mm to 5 mm and a skin contact area in a range from 0.5 mm2 to 10 mm2, wherein the skin interface is configured to be depressed in the ridge at the junction of the nasal bone and nasal cartilage;
• and
• an actuator coupled to the skin interface and configured to vibrate the skin contact surface in an axial direction with a linear displacement in a range from 0.1 mm to 3 mm, wherein the handle is configured to allow the patient to manually press the skin interface in the axial direction to advance the lateral radius of the edge of the skin interface perpendicularly against the junction of the upper lateral nasal cartilage and nasal bone of the patient, at a frequency in a range from 100 Hz to 500 Hz, and with a force in a range from 0.5N to 5N to induce lacrimation.