Abstract: Device for the removal of tissue from the cornea of an eye using a laser beam generator for the production of a laser beam, an optical device by which, during the removal of the tissue, the laser beam is directed onto the cornea to be treated, with an approximately circular beam cross section and a defined removal profile for the beam energy that is transferred to the corneal tissue to be removed, and a control device for controlling the optical device so that a removal profile is formed that, in the radial section starting out from the central beam axis 2 of the beam cross section, has an approximately spherical or concave course in an internal radial region 3 that changes into a point of inflection 4 and an outer radial region 5 that joins the point of inflection 4, with a convex or monotonic decreasing course.

Abstract: The cooktop has a cooking zone (2), at least one electric heating unit (7, 7′) assigned to the cooking zone (2) and a device for detecting a metal pot on the cooking zone (2) and determining its size when the metal pot is resting on the cooking zone (2). The device for detecting the presence and advantageously the size of the metal pot includes a measuring sensor (3) arranged near the cooking zone (2) and one or more evaluation devices (5, 5″) communicating with the measuring sensor (3). The measuring sensor (3) includes a primary measuring coil (8) and one or more secondary measuring coils. The primary measuring coil terminals (8a,8b) are electrically connected with corresponding poles of an alternating voltage generator (4) for generating an alternating current in the measuring coil (8) and a magnetic alternating testing field that interacts with the one or more secondary measuring coils to induce a voltage in them.