Persian cats have large, expressive eyes in shades of gold, green, or blue. Their gentle gaze captures a sense of calm and elegance. Owls possess enormous, front-facing eyes that are adapted for ...

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 ...

The distinctive stalked eyes of this small, sea-dwelling animal had been well studied, but this time the team noticed something unusual. 'In one specimen, we could see a dark structure situated in the ...