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 ...

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 ...

This is because our cone cells function best in relatively bright light. Other cells in our eyes, called rod cells, help us see in dim light. But because rod cells only have a single light-sensitive ...

In the eye are light receptors called cones and rods. Cones help us distinguish different colors, while rods help us see in dim light. The number of cones and rods is different for dogs.

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.

Together, they help your eyes focus so you can clearly see objects at different distances. They also adjust how much light enters your pupil so you can see in dim or bright light. The blood ...

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 ...