Did you know some of the brightest sources of light in the sky come from the regions around black holes in the centers of ...

It's a phenomenon called "eye black." Natural skin absorbs some light, but reflects the rest. This reflection can cause glare and impair vision. Black stripes are supposed to prevent this by ...

An American Journal of Ophthalmology study of 3,654 Australians with dark- and light-colored eyes found a much higher risk of ...

such as blue and gray eyes, are more sensitive to light than people with dark-colored eyes, such as brown eyes. Several studies have found that people with light-colored eyes are more sensitive to ...