Creation of curved cuts in the inside of the eye cornea

A device for quickly and accurately isolating a lenticle in the cornea of an eye, the device comprising:

• a laser beam source configured to emit pulsed laser radiation;
• a beam forming optical unit configured to bundle the pulsed laser radiation in the cornea into a focus and to separate corneal tissue by the focused pulsed laser radiation;
• a beam deflection optical unit configured to shift the focus within the cornea;
• and
• a control apparatus connected to the beam deflection optical unit and configured to control the laser beam source and the beam deflection unit to separate corneal tissue along a curved cut surface by emitting and focusing the pulsed laser radiation to a focus within the cornea and by shifting the focus along a path which is located in the curved cut surface, which cut surface confines the lenticle within the cornea at an otherwise intact status of the cornea, is at least partly curved with regard to a front surface of the cornea, and confines the lenticle to have a clearance to the front surface and to a back surface of the cornea;
• wherein the laser beam source and the beam forming optical unit are configured to minimize tissue-splitting separation of collagen structures of the corneal tissue, thereby improving contour accuracy of the curved cut surface and of dimensions of the isolated lenticle, such that the pulsed laser radiation comprises:
• a pulse frequency of 1.2 MHz to 10 MHz,
• a pulse energy of 1 nJ to less than 100 nJ,
• a pulse length of less than 1 ps,
• a wavelength in the range of 1,030 nm to 1,060 nm, and
• a maximum diameter of the focus of less than 3 μm.