Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light ... It's made up of at least 10 distinguishable layers ...

Unexpected flashes of light in your eye can be alarming, and in many cases, it’s something that should be discussed with your ...

Eye discomfort and fatigue have become increasingly common in today's digital age, with prolonged screen time and close-up tasks often to blame.  Although not a medical diagnosis, the term "eye strain ...

Whereas human eyes contain three types of colour-detecting cells, called cones, dogs have just two. Their cone cells are specialised for picking up yellow ... bright light. Other cells in our eyes, ...

And with eyes covering almost their entire head, they have nearly 360-degree vision too. Nocturnal geckos have superb vision in dim light - their eyes are 350 times more sensitive to colour at night ...

The amount of light entering the eye is controlled by a reflex action. The size of the pupil changes in response to bright or dim light. This is controlled by the muscles of the iris.