If 15 seconds a look at this lady, she will turn into a lovely creation.

• Participants asked to stare at white dot at the centre of the negative 
• After 15 seconds,  glance at the white blank space to the right of the photo
• The  demonic figure transforms into a woman's face - full-colour
• Illusion is known as a 'negative afterimage' and caused by fatigue colour receptors in the back of the eyes and brain 

Read more