Through the eyes of the tiger: To colour the pictures in this colouring book for adults accurately and carefully you need a lot of patience and a keen eye, in fact vision which is as good as that of the tiger. During the day the vision of this big cat is similar to that of a human being, but at night it's very different: in the dark the tiger can see about six times better than we can. So open your inner "eye of the tiger" and experience moments of total relaxation when you colour these pictures.