In a pond of western India, a “squat” creature clutched a stick and floated along the surface. Its “diamond-shaped” eyes scanned the surrounding landscape — but it wasn’t the only one looking around.

These weird and wonderful eyes showcase the boundless ways evolution shapes vision, helping animals thrive in environments that range from the deep sea to open skies. Here are some of the ...

Prey eyes have a negative canthal tilt and visible sclera under the eyelid. Research led by UC Berkeley scientists revealed ...

(Both are named after their relative shapes.) Cones work in bright ... protected during the day. Some animals accomplish this with a retractable eye flap. Others rely on their pupils.