Half a billion years ago, the first true eye emerged in Earth’s oceans. Fossils now reveal what that ancient crystal vision could actually see.

A growing body of neuroimaging research is pinpointing exactly how psychedelic drugs hijack the brain’s visual system to ...

518-million-year-old fossil reveals vertebrates once had four eyes and extra organs that later shaped evolution.

This story is part of a series on the current progression in Regenerative Medicine. This piece is part of a series dedicated to the eye and improvements in restoring vision. In 1999, I defined ...

How optical illusions work has been long-debated among scientists and philosophers, who wonder whether these illusions stem from neural processing in the eye or involve higher-level cognitive ...