halation

noun Photography.

1. a blurred effect around the edges of highlight areas in a photographic image caused by reflection and scattering of light through the emulsion from the back surface of the film support or plate.

noun

1. photog fogging usually seen as a bright ring surrounding a source of light: caused by reflection from the back of the film

n.

1. Blurring of the visual image due to glare from strong illumination.
2. A blurring or spreading of light around bright areas on a photographic image.