Abstract: A 3D printing apparatus for manufacturing a workpiece has a first radiation source to carry out a non-linear absorption polymerization and a second radiation source to carry out optical coherence tomography. A first beam path is traversed by the first radiation and a second beam path is traversed by the second radiation. The first and second beam paths are formed completely independently of one another. Further, a 3D printing method for manufacturing a workpiece, another 3D printing apparatus, and methods for analyzing the quality of a raw material of a non-linear absorption polymerization; checking an orientation of a substrate to be printed by non-linear absorption polymerization; determining a spatially resolved degree of conversion of a non-linear absorption polymerization; analyzing a structural sharpness of a structure produced by non-linear absorption polymerization; and for three-dimensional reconstruction of a workpiece manufactured by non-linear absorption polymerization are disclosed.

Abstract: An apparatus for influencing an intraocular pressure (IOP) of an eye with a controllable discharge device which is configured to discharge a liquid from at least one area of the eye. The apparatus includes a first sensor device which captures at least one first value that is characteristic for the IOP of the eye, and a second sensor device, which captures at least one second value that is characteristic for a pressure acting on the eye, and a control device which controls the discharge device at least at times taking account of the first characteristic value and the second characteristic value, wherein the second characteristic value is characteristic for an intracranial pressure and/or cerebrospinal pressure.

Abstract: An apparatus for influencing an intraocular pressure (IOP) of an eye with a controllable discharge device which is configured to discharge a liquid from at least one area of the eye. The apparatus includes a first sensor device which captures at least one first value that is characteristic for the IOP of the eye, and a second sensor device, which captures at least one second value that is characteristic for a pressure acting on the eye, and a control device which controls the discharge device at least at times taking account of the first characteristic value and the second characteristic value, wherein the second characteristic value is characteristic for an intracranial pressure and/or cerebrospinal pressure.