Object having an at least partially curved surface with a microstructuring of structuring elements at least in the region of the curvature , wherein the object has a removal direction which, in the case of mutually parallel side faces of the microstructuring elements (11 and 13), is defined by the direction parallel to these side elements and, if the side elements (11 and 13) of the microstructuring elements are not mutually parallel, is determined by that direction which makes it possible to remove the object with microstructuring with as small as possible an expenditure of force from a mould in which this object was moulded, wherein (i) the structuring elements are mutually parallel irrespective of the curvature, (ii) the structuring elements each have a face which is of equal size in relation to the other microstructuring elements and faces away from the surface of the object , and (iii) the respective distance between the respectively adjacent side faces of the structuring elements is the same, - when these structuring elements lie together in one of the planes in which the removal direction also lies, and - the distance is measured on a straight line which runs parallel to the tangent that lies on the distance centre point between the respective structuring elements , and - wherein the tangent and the straight line which runs parallel to it and on which the measurement is taken are located so as to produce the shortest possible distance which touches the two adjacent structuring elements and - which ends in the point on at least one of the side faces and which is furthest away from the surface of the object . wherein the object has a removal direction which, in the case of mutually parallel side faces of the microstructuring elements (11 and 13), is defined by the direction parallel to these side elements and, if the side elements (11 and 13) of the microstructuring elements are not mutually parallel, is determined by that direction which makes it possible to remove the object with microstructuring with as small as possible an expenditure of force from a mould in which this object was moulded, wherein (i) the structuring elements are mutually parallel irrespective of the curvature, (ii) the structuring elements each have a face which is of equal size in relation to the other microstructuring elements and faces away from the surface of the object , and (iii) the respective distance between the respectively adjacent side faces of the structuring elements is the same, (i) the structuring elements are mutually parallel irrespective of the curvature, (ii) the structuring elements each have a face which is of equal size in relation to the other microstructuring elements and faces away from the surface of the object , and (iii) the respective distance between the respectively adjacent side faces of the structuring elements is the same, - when these structuring elements lie together in one of the planes in which the removal direction also lies, and - the distance is measured on a straight line which runs parallel to the tangent that lies on the distance centre point between the respective structuring elements , and - wherein the tangent and the straight line which runs parallel to it and on which the measurement is taken are located so as to produce the shortest possible distance which touches the two adjacent structuring elements and - which ends in the point on at least one of the side faces and which is furthest away from the surface of the object . <EOS>