What's the deal with auras?

i see blue and/or yellow “auras” around everything after having my pupils dilated at the optometrist’s.

Huh? Cite, please?

For those referring to the paranormal type of aura: these are not a real phenomenon. These type of auras are supposed to be emitted from objects. The camaras used at psychic fairs etc are a scam.

Auras are either an optical illusion or caused by a neurological disturbance, such as a migrane. The migrane aura remains in the same part of the feild of vision, it is not associated with objects.

More information on auras.