The invention relates to a device (18) and a method for irradiating a target structure (1) with laser radiation (4) and to a suitable use of a focal spot or point (6) produced by the laser radiation (4). The device (18) has at least one laser light source (2) and at least one optical element (3), by means of which the laser radiation (4) is guided through a light outlet (5) and focussed in a focal point (6) outside the light outlet (5). The invention also relates to at least one adjustment element (7) used to adjust the distance between the surface of the skin (8) and the focal point (6) positioned in the region of the target structure (1). The described technical solution is characterised in that the optical element (3) comprises an arrangement of a convex mirror (9) inside a hollow mirror (10), said mirrors being arranged such that laser radiation (4) emitted from the laser light source (2) enters the hollow mirror (10) at least partially through an opening (11), and the laser radiation (4) that passes through the opening (11) hits the convex mirror (9), is deflected from the convex mirror (9) to the hollow mirror (10), and passes through the light outlet (5) from the hollow mirror (10).
