HOW AGEING MANIFESTS IN THE SKIN TWO DIFFERENT TYPES OF AGEING Skin ageing is a progressive process in which environmental damage determines the ultimate skin appearance. Intrinsic ageing affects unexposed and exposed skin and is characterised by dryness, laxity, fine wrinkles, and skin atrophy. Extrinsic ageing or photo-ageing, is the result of repeated exposure to ultraviolet (UV) light. Photo-ageing affects the sun exposed areas and is characterised clinically by fine and