Flare
This has two meanings: 1.: When using film on a daylight spool, the erratic pattern of raw light that washes out the beginning and end of the roll are known as “the flares.” 2.: A flare of the other kind is a Lens Flare. It is caused when light strikes the lens and either causes the entire image to be fogged in appearance, or for a little row of polygons (the silhouette of the iris) to appear from the light hitting the surfaces of the many elements in the lens. It is solved by flagging the lens.