Phacomorcelation device (200) configured to prevent lens fragments from floating towards a back of an eye, the phacomorcelation device comprising: a fixed external tubular cutting element (255, 355, 455) having a proximal end and an end distal, the proximal end being coupled to a housing (205), the distal end comprising a first opening； a motor (225) placed inside the housing (205) and which can be selectively controlled by one or more user control inputs coupled to the housing； and an internal cutting element (260, 360, 460) comprising a proximal end and a distal end, the internal cutting element being placed inside the fixed external tubular cutting element (455), the motor (255) being coupled to the proximal end for rotating the internal cutting element with respect to the fixed external tubular cutting element, the internal cutting element having a second opening that is substantially symmetrical to the first opening, the second opening comprising a second cutting edge (506B) ； wherein the first opening is substantially closed when the internal cutting element (460) is rotated to a closed position, characterized in that the first opening further comprises a first cutting edge (506A) and a first point (508A) formed by two drying arcs (506A, 506D), the first point being placed on a first side of the first opening and the second opening also comprising a second cutting edge (506B) and a second point (508B) formed by two drying arcs (506B , 506C).Dispositivo de facomorcelación (200) configurado para evitar que fragmentos de cristalino floten hacia una parte posterior de un ojo, comprendiendo el dispositivo de facomorcelación: un elemento de corte tubular externo fijo (255, 355, 455) que tiene un extremo proximal y un extremo distal, estando el extremo proximal acoplado a un alojamiento (205), comprendiendo el extremo distal una primera abertura； un motor (225) colocado dentro del alojamiento (205) y que se puede controlar de manera selectiva mediante una o más entra
