Even Charles Darwin was puzzled by the evolution of the vertebrate eye. New research suggests that it traces back to a cyclopean invertebrate with a single eye atop the head.

Apple snails can fully regrow their eyes, and their genes and eye structures are strikingly similar to humans. Scientists mapped the regeneration process and used CRISPR to identify genes, including ...

Retinal vein occlusion (RVO) is a severe disease that occurs when a vein in the light-sensitive layer at the back of the eye (i.e., the retina) becomes blocked, which results in a loss of vision.