surgical device for treating target tissue, comprising: a set (12) light source for generating a light beam treatment a microscope (14) including: a mirror management (50) for directing the processing beam onto the target tissue and a plurality of second optical elements (56, 58, 60, 62) to generate an image of the target tissue from light emanating from the target tissue, said plurality of second optical elements at least one objective lens (56) and a step of increasing (58) a translation device (66) and control electronics (40) for controlling the transfer device (66) in order to make the treatment beam to move along the target tissue in a predetermined pattern, characterized in that the translation device (66) is arranged to move: (i) mirror management (50) and the plurality of second optical elements (56, 58, 60, 62), (ii) the assembly (12) light source, the mirror management (50) , the objective lens (56) and the step of increasing (58), (iii) the assembly (12) light source, the mirror management (50) and the objective lens (56), or (iv) the objective lens (56), the objective lens (56) located on the target side of the mirror management (50) in relation to the target tissue in order to simultaneously move both the treatment beam along the target tissue as a field of view of the target tissue defined by the plurality of second optical elements (56, 58, 60, 62).Dispositivo quirúrgico para tratar tejido diana, que comprende: un conjunto (12) de fuente de luz para generar un haz de luz de tratamiento un microscopio (14), que incluye: un espejo de administración (50) para dirigir el haz de tratamiento sobre el tejido diana y una serie de segundos elementos ópticos (56, 58, 60, 62) para generar una imagen del tejido diana a partir de luz que emana del tejido diana, incluyendo dicha serie de segundos elementos ópticos por lo menos una lente de objetivo (56) y una etapa de aumento (58) un dispositivo de traslación (66) y electrónica de control (40) para controlar el di
