- visual halo
- Also referred to as halo and halo vision. All three terms are indebted to the Greek noun halos, which means area. In biomedicine the terms halo and visual halo are used to denote a luminous or coloured circle surrounding visually perceived stimuli or objects, notably lights. Visual halos tend to be classified either as * visual illusions or as * entoptic phenomena. Etiologically, they are associated primarily with a variety of ocular conditions, including corneal lesions (either traumatic or infectious in nature, or as a complication of eye surgery or laser treatment), Sattler veil, cataract, and glaucoma. They are also associated with diabetic * hypoglycaemia, and migraine. In the past the term halo has also been used to denote what is currently known as a * corona phenomenon, i.e. a visual illusion consisting of an extra edge around an object.ReferencesAllen, R.J., Saleh, G.M., Litwin, A.S., Sciscio, A., Beckingsale, A.B., Fitzke, F.W. (2008). Glare and halo with refractive correction. Clinical & Experimental Optometry, 91, 156-160.
Dictionary of Hallucinations. J.D. Blom. 2010.
Look at other dictionaries:
halo — Also known as optical halo and corona. The term halo comes from the Greek noun halos,which means area. In meteorology and physics the terms halo, optical halo, and corona are used to denote a * physical illusion consisting of a luminous or… … Dictionary of Hallucinations
halo vision — see visual halo … Dictionary of Hallucinations
Halo 3: ODST — Developer(s) Bungie Publisher(s) Microsoft Game Studios … Wikipedia
Halo 2 — Desarrolladora(s) Bungie Studios (Xbox) Hired Gun (PC) Pi Studios (Herramientas de edición para PC … Wikipedia Español
HALO 8 Entertainment — is a film production distribution company specializing in punk rock cinema, dangerous indie films and alt culture videos . Halo 8 was formed in 2005 by filmmaker Matt Pizzolo. It currently releases projects from award winning filmmakers such as… … Wikipedia
Halo 3 — Developer(s) … Wikipedia
Halo: Combat Evolved — Desarrolladora(s) … Wikipedia Español
Halo: Reach — Developer( … Wikipedia
Halo Graphic Novel — infobox Book | name = Halo Graphic Novel title orig = translator = image caption = The front cover of the Halo Graphic Novel author = Various cover artist = Phil Hale country = United States language = English series = genre = Science fiction… … Wikipedia
Characters of Halo — Recurring characters of Halo are organized below by their respective factions in the fictional universe. The multimedia franchise s central story revolves around an interstellar war between future humanity under the auspices of the United Nations … Wikipedia