Sheikh R, Hammar B, Naumovska M, et al. - In the present study, researchers sought to examine the temporal artery in 12 healthy individuals, aged 60 years or older, with photoacoustic (PA) imaging, and to assess the impacts on visual function in detail, in terms of the visual acuity, colour vision and visual field, in order to confirm the safety of the technique and to evaluate the patient tolerability of PA examination. In addition, they characterized the spectral signature obtained the healthy temporal artery. Findings suggested that PA imaging of the temporal artery is well tolerated and can be done without any harm to visual function, including the function of the retina and the optic nerve. The temporal artery spectral signature is unique, which is encouraging for the development of future methods.