Abstract: To adjust eye-glasses to the special shape of the nose of the person wearing the eye-glasses, a faithful molding of the back of the nose is formed. To this effect, once the spectacles are put on, the space remaining between the spectacle arch (4) and the back of the nose is filled with a plastic and hardenable molding material. The spectacle arch (4) is embedded into the hardened molding material to form a plaster model (6). After having removed the molding material, the cavity separating the spectacle arch (4) from the model (6) is filled with a hardenable plastic material which sets on the spectacle material. Said plastic material forms after hardening on the spectacle arch (4) an additional layer (5) adapted to the back of the nose of the person wearing the spectacles.