Abstract: According to an aspect, there is provided a system (40) configured to perform a personal care operation on skin of a subject. The system (40) comprises a processing unit (46) and a personal care device (2). The personal care device (2) comprises a housing (4) having an aperture (10) that is arranged in the housing (4) such that the aperture (10) is adjacent to the skin when the personal care device (2) is in contact with the skin and is to be used to perform the personal care operation on the skin. The personal care device (2) also comprises an imaging unit (44) disposed in the housing (4) and arranged to obtain images of the skin adjacent to the aperture (10) using light passing through the aperture (10) into the personal care device (2), wherein, in a skin contact detection mode of the system (40), a focal plane (66) of the imaging unit (44) is aligned with the aperture (10).