It is a surgical or medical operation which is going to modify the morphology of the nose, in a partial or complete way. The purpose is to embellish the nose by correcting the ungraceful parts either in disharmony, while respecting, or by improving the functions of the nose "Breath and Olfaction". So that the nose is in accordance with the other parts of the face, he needs good proportions. It is the eye exercised by the surgeon (without necessity of formulae of mathematics or geometry) during the consultation, that will judge this balance to integrate(join) better the nose into the esthetics of the face.