Abstract: The invention relates to an ophthalmologic laser system (1) comprising an ultra-short pulse laser (2) for outputting ultra-short laser pulses (3), focusing optics (4) for producing at least one focal point (5) on and/or in the eye lens (6) of the patient's eye (7), a deflection mechanism (9) for varying the position of the focal point (5) on and/or in the eye lens (6), and comprising a control mechanism (11) for controlling the deflection mechanism (9). The laser system (1) is characterized in that the laser pulses output by the ultra-short pulse laser (2) and the size of the focal point (5) fixed by the focusing optics (4) are configured such that a fluence can be applied below or on the disruption threshold of the material of the eye lens (6) at the focal point (5), wherein said fluence is at the same time sufficiently high to cause changes in at least one material property of the material of the eye lens (6).