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The Paschen-Back effect influences the Zeeman sublevels of the He I multipletat 10830 {\AA}, leading to changes in strength and in position of the Zeemancomponents of these lines. We illustrate the relevance of this effect usingsynthetic Stokes profiles of the He I 10830 {\AA} multiplet lines andinvestigate its influence on the inversion of polarimetric data. We invert dataobtained with the Tenerife Infrared Polarimeter (TIP) at the German VacuumTower Telescope (VTT). We compare the results of inversions based on syntheticprofiles calculated with and without the Paschen-Back effect being included. Wefind that when taking into account the incomplete Paschen-Back effect, onaverage 16% higher field strength values are obtained. We also show that thiseffect is not the main cause for the area asymmetry exhibited by many He I10830 Stokes V-profiles. This points to the importance of velocity and magneticfield gradients over the formation height range of these lines.

Milne-Eddington inversions of the He I 10830 {\AA} Stokes profiles: Influence of the Paschen-Back effect