Gray spots in your eye may be harmless, due to age or even injury. But they can also be a sign of a more serious condition, including the start of cancer.

Blue and grey eyes, on the other hand, only have dark brown pigment on the back layer of the eye. The stroma has no pigment, but it does have small particles suspended in it. These particles give ...

Inspired by nature, scientists created a self-powered device that recognizes color just like our eyes, paving the way for advanced machine vision.

“This is likely due to the sparsity of light-absorbing pigment in the eye.” Having lighter-coloured eyes - grey, green and blue - could mean an increased risk of cancer.

A new study shows the process by which blue light can lead to eye disease like macular degeneration. ... What appears as white light, ... actually includes almost every color in the spectrum.

However, the blue tapetum also lets up to 60 percent of UV light pass through to the eye’s color sensors. The reindeer likely see the winter world as a shade of purple the way a human may see a ...

Our perception of color depends on interpreting the amount of light in a room or scene. When cues about the ambient light are missing, people may perceive the same color in different ways. Related ...