Flare

Keywords: Lensflare

Lensflares are caused by reflections in the lens of a camera. It happens all the time in film, and they are used for artistic effect quite often. In games, there is no lens, but the visual look is still often desireable so it's added in. It is usually used to enhance the feeling of a certain bright object.

https://en.wikipedia.org/wiki/Lens_flare