The present invention relates to a solution for measuring geometric parameters in the eye required for calculating the refractive power of intraocular lenses. The device according to the invention for axial length measurement, capturing axial length, anterior corneal radii, anterior chamber depth, and other parameters in the anterior eye segment, comprises a control unit, a first measuring device for determining the axial length, and an additional measuring device that captures a plurality of structures in the anterior segment, such as the cornea, anterior chamber, and lens, and has at least one illumination unit and at least one image capturing unit. The device according to the invention relates to a solution for measuring geometric parameters in the eye required for calculating intraocular lenses. By determining additional partial parameter sections of the anterior eye segments, even after refractive surgery, in which the natural relationship between the radii of the anterior and posterior corneal surfaces is permanently changed by surgical modification of the cornea, the IOL can be calculated with high precision.
