The company behind Botox has recently launched eye drops in the United States that help eyelashes to grow longer, thicker and darker - so is it time to throw out the mascara? To take a look at the new eye drops and eyelash fashion, Jenni's joined by Ophthalmologist, Carolyn Atherley, and by writer, Hannah Betts, to explore our century-old obsession with this most subtle of the facial features.