Forget 50 Shades of Grey - human eyes are only capable of seeing THIRTY hues between black and white, claim scientists. Scientists trying to improve ebook screens say our grey vision is limited ...

The researchers found that when the Einstein-plus-Hadamard patterns were projected slowly, in pulses of 1 second or longer, people just saw black-and-white checkerboards — no ghost images.

A close-up photograph of what appears to be a light-brown human eyeball shows the organ's expansive, cavernous depths surrounding a seemingly bottomless, black pit that, together, mimics the ...

Of all primates, human eyes are the most conspicuous; our eyes see, but they are also meant to be seen. Our colored irises float against backdrops of white and encircle black pupils.

For example, unlike many other animals, human eyes have white in them. This white part, called the sclera, is found on the outside edges of the eyeball. For other animals, ...

The human eye's hallmark trait is its medley of colors. The iris, which surrounds the pupil, can appear blue, green, gray, hazel, brown, and even red. Differences in levels of the pigment melanin ...

Learn about the human eye and how our sight works with 2nd level Science on Bitesize. ... picking out black, white and shades of grey, ... Pupil - Black part of the eye.

The white-gold, black-blue dress controversy raised scientific questions about visual perception, but the way our eyes and brains work explain the illusion.