The invention relates to the field of producing polymer objects and concerns a method and a device for forming a three-dimensional object from a liquid photopolymer. The present method includes exposing elementary cross sections to actinic radiation, moving an object along a build axis, and forming the object from a fluid zone of a border zone of a photopolymer. To provide fluidity of the border zone, the wave front of the radiation is converted so that the specific power of the radiation on the exposed regions has a gradient along the build axis, and the photopolymer in the fluid border zone is partially exposed. A device for forming a three-dimensional object comprises a source of actinic radiation, a mechanism for moving an object along a build axis, and a vessel for accommodating a photopolymer, which is provided with an optical interface window. The optical interface is in the form of a converter for converting the wave front of the actinic radiation, in the focal region of which an optically transparent element is disposed for contact with the photopolymer. The technical result is better quality finished objects, a faster production process and the possibility of using photopolymers with different polymerization types to form an object.