It may surprise you, then, to learn that bioluminescence has been detected in humans. That’s right, we glow in the dark – it’s just really, really, really faint.

Researchers at the University of Science and Technology in Hefei, eastern China, have now developed a contact lens that converts infrared light into visible light, enabling humans to see in the dark.

Humans can now see in the dark -- and even with their eyes closed -- using nanotechnology contact lenses that turn invisible infrared light into visible images, according to a new study published ...

Humans' ability to perceive color varies due to how we see under different lighting conditions. Human eyes contain two types of photoreceptors, or nerve cells that detect light: rods and cones.

We humans differ from our hominid ancestors like chimpanzees and gorillas in many obvious ways, but a subtle distinction – often missed – can be seen in our eyes. In humans, the sclerae, the opaque, ...