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For instance, this image:

enter image description here

shows human eyelashes close up.

The lashes look green, in fact the whole surface area has a strange tint of green Why is this?

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Sounds like a heavy application of mascara! –  Trevor Alexander Dec 26 '13 at 5:33
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1 Answer

up vote 11 down vote accepted

It seems that it is an electron microscope image. It doesn't use photons, but electrons. So the image has been coloured digitaly.

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+1, but why are the digital colors green? –  shortstheory Dec 26 '13 at 9:36
    
"Colored digitally" here means that the color has been artificially added to the image after the fact. Green is simply what this artist happened to choose. –  David Zhang Dec 26 '13 at 9:59
    
Also green has maximum response of the human eye.So it helps to give contrast to the detail. –  Sandesh Kalantre Dec 26 '13 at 13:24
    
Thanks guys, this really cleared things up. –  user36305 Dec 26 '13 at 23:50
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