- Nothing is What it Seems Like -
When you look at the picture, what do you perceive in it at first - a young girl or an old woman with a scarf ?
If the first to spot is a young girl, look back and try and you will recognize an old woman with a headscarf. A small sign, the girl's chin is, in fact, the old woman's nose. Then, try to see both simultaneously. It does not work.
The explanation for this optical illusion is the same as that of the famous duck - rabbit illusion. Since the process of looking different from the recognition process. So, although the figure did not stop to show a young girl, she was gone the moment you've noticed an old woman with a headscarf.