Abstract: The invention relates to an optical sensor device (1) for determining a blood perfusion parameter of a user. A light source (2) provides coherent light for scattering in a tissue sample (11) and a light detection unit (3) receives scattered coherent light in a re-emission geometry, the light detection unit (3) comprising plural light detection elements (32a; 32b) for capturing light intensity values in increasing distances from the light source (2) in accordance with different tissue depths. An evaluation unit (10) determines contrast values based on the captured light intensities, determines one motion-corrected value of the blood perfusion parameter based on the contrast values associated with the different tissue depths. Moreover, the invention relates to a method determining at least one blood perfusion parameter using the sensor device (1).