Magic!

..look at this picture for ten seconds.Focus on the coloured dots and then shift your-gaze to a plain white wall preferably ,you will see the person clearly in colour without a negative...its a magic... an after effect of the negative picture...

when I first looked at the plain wall I was totally surprised ... as to how this works..

can you guess who is this lady?

...if we have an opthomerist among us ...they will definitely give a right answer.