Use of a dispenser attachment, in particular a dispenser attachment for microscopy objectives, in a device for writing three-dimensional structures by means of laser lithography in a lithography fluid which can be solidified by means of irradiation using laser light, the device comprising: - a laser beam source for emitting a writing beam; - a substrate for receiving lithography fluid; - an objective for forming a focus region of the writing beam in the lithography fluid, the objective comprising an objective housing and an exit lens; the dispenser attachment comprising: - a dispenser housing which is designed to be placed on the objective such that a fluid space is formed between the objective housing and the dispenser housing and such that an outlet gap is formed between the dispenser housing and the exit lens; and - a fluid inlet into the fluid space, wherein the following steps are carried out for use: - providing a lithography fluid which is adapted to the laser beam source such that solidification takes place only in the focus region and using a multi-photon process; - supplying the lithography fluid through the fluid inlet into the fluid space; - applying a volume of lithography fluid through the outlet gap; - introducing the writing beam through the objective into the volume of lithography fluid and locally solidifying the lithography fluid in the focus region by means of a multi-photon process for writing the three-dimensional structure. the device comprising: - a laser beam source for emitting a writing beam; - a substrate for receiving lithography fluid; - an objective for forming a focus region of the writing beam in the lithography fluid, the objective comprising an objective housing and an exit lens; - a laser beam source for emitting a writing beam; - a substrate for receiving lithography fluid; - an objective for forming a focus region of the writing beam in the lithography fluid, the objective comprising an objective housing and an exit lens; the dispenser attachment comprising: - a dispenser housing which is designed to be placed on the objective such that a fluid space is formed between the objective housing and the dispenser housing and such that an outlet gap is formed between the dispenser housing and the exit lens; and - a fluid inlet into the fluid space, - a dispenser housing which is designed to be placed on the objective such that a fluid space is formed between the objective housing and the dispenser housing and such that an outlet gap is formed between the dispenser housing and the exit lens; and - a fluid inlet into the fluid space, wherein the following steps are carried out for use: - providing a lithography fluid which is adapted to the laser beam source such that solidification takes place only in the focus region and using a multi-photon process; - supplying the lithography fluid through the fluid inlet into the fluid space; - applying a volume of lithography fluid through the outlet gap; - introducing the writing beam through the objective into the volume of lithography fluid and locally solidifying the lithography fluid in the focus region by means of a multi-photon process for writing the three-dimensional structure. - providing a lithography fluid which is adapted to the laser beam source such that solidification takes place only in the focus region and using a multi-photon process; - supplying the lithography fluid through the fluid inlet into the fluid space; - applying a volume of lithography fluid through the outlet gap; - introducing the writing beam through the objective into the volume of lithography fluid and locally solidifying the lithography fluid in the focus region by means of a multi-photon process for writing the three-dimensional structure.