A needleless injector including a body comprising a fluid chamber; an outer shaft extending from an outer shaft proximal end to an outer shaft distal end, the outer shaft comprising an outer shaft lumen to accommodate an injection shaft; an injection shaft located within the outer shaft lumen and moveable lengthwise, rotationally, or lengthwise and rotationally, within the outer shaft lumen, the injection shaft comprising an injection shaft proximal end, an injection shaft distal end, an injection shaft terminus, and an injection lumen; an injection orifice at the distal end of the injection shaft and in fluid communication with the fluid chamber through the injection lumen; a pressure source in communication with the fluid chamber; and an optical device that allows viewing a location at a distal end of the device.