Before he used a magnifying lens last week to peer into Molly's eyes, Fife noted that many pet owners good-naturedly "want to know how I get animals to read the eye chart." But Branscome was ...

Photographer Suren Manvelyan's latest collection contains extreme close-up photos of various animal eyes, including humans, rabbits, lemurs, chimps, tigers and more taken at Yerevan Zoo in Armenia.

This eye test chart was first invented by Ferdinand Monoyer, a French opthalmologist, or eye doctor, who would have been 181 years old today. Who was Ferdinand Monoyer?

The human eye contains three types of cone cells, photoreceptors that allow us to see blue, green and red light. Many animals have different combinations of photoreceptors, which means that they ...

So three groups of animals build their eyes using related master eye genes: the hydrozoan jellyfish, represented by Cladonema, use Pax-A; the cubozoan jellies, represented by Tripedelia, use Pax-B ...