When defensive, guppies display a warning sign to their counterparts. 

For the first time, a transplant of replacement tissue grown from stem cells has been shown to be feasible for patients with macular degeneration.

People whose pupils change more dramatically during a visual perception task tend to score higher on a self-reported scale of autistic traits.

Researchers outfitted praying mantises with miniature spectacles to investigate how they see the world. 

A study of 13 starfish species reveals that even animals that live at depths where sunlight doesn’t reach have functioning eyes.

Pupil constriction during sleep may protect the murine brain from being awakened by sudden flashes of light.

Researchers develop a new method to highlight specific cells that reside in the lens of a zebrafish.

People who read normally tend to have one dominant eye while people with dyslexia do not, research shows.

This 10-centimeter-wide pig eye replica includes even the most intricate of blood vessels, some no wider than 30 micrometers.