From eyes the size of a dinner plate to 360-degree vision, these animals boast extraordinarily efficient ways of seeing. Meet the creatures with the most crafty, strange and sophisticated eyes in the ...

If this eye detects dark patches, the jellyfish senses that it’s swimming beneath the mangrove canopy, where it can find the small crustaceans that it eats. If it sees only bright light ...

Medically reviewed by Christine L. Larsen, MD Medications, trauma, and medical conditions can lead to abnormally small pupils ...

Eyes are so intricate ... The next step is to evolve a small depression containing the light-sensitive cells. This makes it easier to discriminate the direction the light is coming from and ...