Insect eyes are generally sensitive to ultraviolet, blue and green light. With the exception of some butterflies, they cannot ...

For decades, scientists have used near-infrared light to study the brain in a noninvasive way. This optical technique, known ...

Researchers at the University of Glasgow just achieved what many thought impossible: transmitting light completely through an adult human head from one temple to the other.

Cataract surgery is typically a quick outpatient procedure that replaces the cloudy lens with a clear ... eyes or lowering blood pressure. Keep an eye out for symptoms like flashing lights, floaters, ...