Why the Deepika negative image works on your eyes that way?

Last updated on: February 2, 2012 at 7:44 pm by Desh Kapoor

Why the Deepika negative image works on your eyes that way? 2012-02-02T19:44:19-06:00 Desh Kapoor

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Have you looked at the latest Image negative of Deepika Padukone doing rounds on Facebook? Why does it work like that?

Here is what you need to do – Stare at the red dot on the lady’s nose for 30 second or so. Then look at a white space – white sheet of paper or even an empty browser screen. And you suddenly see the image of Deepika Padukone on the white space rightaway for a few second.

Why does it work like that? Here is the scientific reason why you see what you see:

Here’s how it works: stare long enough at an object and the eye’s photoreceptors (particularly the color-sensitive cone cells) lose sensitivity from overstimulation. Divert the eyes to a blank space, and the surrounding cone cells send out a much stronger signal. The brain interprets this discrepancy as looking at the precise opposite colors, in what is known as a ‘negative afterimage.’

What is an afterimage and how does it work on your senses is explained below:

An afterimage or ghost image or image burn-in is an optical illusion that refers to an image continuing to appear in one’s vision after the exposure to the original image has ceased. One of the most common afterimages is the bright glow that seems to float before one’s eyes after looking into a light source for a few seconds.[citation needed]

Closing the eye can help achieve a better sense of the color in its own aspect.

Afterimages come in two forms, negative (inverted) and positive (retaining original color). The process behind positive afterimages is unknown, though thought to be related to neural adaptation. On the other hand, negative afterimages are a retinal phenomenon and are well understood.

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