Why does this man's face look asymmetrical? Indeed, the left side of his face is different from his right side. Surely, it looks older. No, this image is not photoshopped! So, what could explain his look? This man was a truck driver for 28 years. How is it related to his skin? In fact, on sun-exposed skin, up to 90% of skin aging is due to ultraviolet rays emitted by the sun. This man had his left side directly facing the sunlight while he was driving all this time. Notice how ultraviolet rays (UVR), especially ultraviolet A, can penetrate through window glass and directly affect the skin! When the skin is exposed to UVR, it looses its elasticity causing wrinkles. In contrast, the other side of his face was not facing the sun and was therefore protected from UV rays! Following the publication of this case in the New England Journal of Medicine similar studies were done in Australia confirming that there aging is accelerated on the right side of the face of the drivers. This photo really illustrates how neglecting sun protection can impact your appearance!