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.

Every time the human eye darts from one point to another, the retinal image smears across the visual field. These rapid jumps, called saccades, happen several times per second, yet the world never ...

This colorful fan of cells from the eye of a developing zebrafish offers a window into the location of specific cell types and their organelles within a growing eye. Get a closer view of the image Get ...

An estimated 5-15% of people have problems with dry eyes, with symptoms including eye redness, stinging, or burning sensation, and eye fatigue. Dry eye disease (DED) occurs when the eyes' tear glands ...

Scientists are amazed at the discovery of a bristle worm with such sharp-seeing eyes that they can measure up to those of mammals and octopuses. The researchers suspect that these marine worms may ...

The front surface of our eyes is covered by a thin layer of tears. The tears keep our eyes clean and comfortable, and are very important for good vision. Healthy tears contain oil, water and mucus in ...