(EN) The invention relates to a device for polishing optical lenses including: a lens holder (4); a means for positioning said lens holder (4); and a means for rotating said lens holder (4) about an axis wherein said polishing device further includes: a polishing tool (3); a tool holder (3); a means for positioning said tool holder (3); and a means for rotating said tool holder (3) about an axis. Said device moreover includes a ball joint arranged between a shaft (9) secured to the tool holder (3) and the means for positioning said tool holder (3) or between a shaft (9) secured to the lens holder (4) and the means for positioning said lens holder (4) so as to enable a spherical movement of said tool (2) and of said lens. The invention also relates to a method for polishing using the device according to the invention.