Machine for drawing metal sheets, which comprises a static support and a moving support that hold a metal sheet during a process of drawing said metal sheet, and driving means that cause a longitudinal movement of said moving support in relation to said static support during said process, a section of said metal sheet comprised between said supports being drew and tensioned. The composition comprises a combination of lutein, zeaxanthin, glutathione and alpha lipoic acid, optionally supplemented with an extract of Lucium Barbarum Lynn. In the mounting part forming process, a light source mounting part is formed by removing the spacer. Preferably, the closed loop is initially configured with a first feedback bandwidth and is subsequently reconfigured with a second steady-state feedback bandwidth that is less than the first feedback bandwidth.