New fossil evidence from China suggests that some of our vertebrate ancestors had four eyes. The study, published in Nature, takes a closer look at a structure found in multiple 518 million-year-old ...

The discovery fundamentally changes the understanding of a structure in the avian eye that has been misinterpreted for centuries.

A new study explains how birds maintain sharp eyesight despite their retinas lacking blood vessels, finally resolving a centuries-old biological paradox.

Neural tissue normally dies quickly without oxygen. Yet bird retinas—among the most energy-demanding tissues in the animal ...

Electronic retinal implants such as the PRIMA system bypass damaged cells to restore partial central vision, bringing ...

Eye drop nanoparticles that shrink over time overcome the eye's natural defenses, delivering protein drugs to the retina and ...

Researchers have identified a metabolically sensitive cell subtype in the eye's drainage system which shows early signs of ...

Background Both host and microbe metabolism of tryptophan (Trp) is altered in diabetes; however, the molecular mechanisms are ...