Of all the skin issues that come with ageing, I didn't think my eyelids would become one of my top concerns. But in my mid-40s, I began to notice how the shape of my eyes seemed to have changed.

'Mum, I have a slight line forming - do you think I need to get it treated?' That's what my 23-year-old daughter Grace said recently, as she pointed to a faint line running down her youthful forehead.