Optical illusionsVersión en línea A conversation about optical illustions. por Esther Mercado A What's this? B It's an optical illusion. What do you see, an old woman or a young girl? A A young girl. B OK, if you look at the picture for some time, you can see the image change. A Hmm. The image isn't changing. B Look, the face of the young woman becomes the nose of the old woman. Give it a minute and you'll see it.