It's caused by inflammation in the uvea, a layer of tissue just inside the outer white part of your eye. The uvea is made up of a layer of blood vessels, a muscular ring that surrounds your pupil ...

When the lights are off his pupil goes white. You couldn't see it properly, you could see it if you looked a certain way and there was a reflection in his eye, you could see a little bit of white ...

ETH Zurich researchers found that pupil size changes during sleep, indicating shifts in brain activity. This could help ...

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

IN the past many investigations have been carried out on the static and dynamic reactions of the human pupil to illumination of the eye using white light. In this respect it seems surprising that ...

That coloured circle is called the iris and the black spot in the middle is the pupil. This is the part of the eye that lets the ... picking out black, white and shades of grey, and the cones ...