fiery rings of Purkinje
   The eponym fiery rings of Purkinje refers to the Bohemian physiologist Johannes Evangelista Purkyne (1787-1869), who is credited with being the first to describe the concomitant phenomenon in his textbook of 1823. The phenomenon consists of two large rings that can be seen after rapid convergence movements of the eyes, especially in a dark environment. It is classified as atypeof* convergence phosphene, which is in turn classified as an * entoptic phenomenon or a * physiological illusion. Because of its occurrence in a dark environment, the phenomenon is also classified as a * closed-eye hallucination (although the term closed-eye illusion might be more appropriate). The mediation of this phenomenon is associated with the stretching of the optic nerve and the region of the papillae. The term fiery rings of Purkinje is used in opposition to *dumbbell phosphene. Conceptually and phenomenologically, it is considered closely akin to * Moore's lightning streaks and the *flick phosphene.
   References
   Purkyne, J.E. (1823). Beobachtungen und Versuche zur Physiologie der Sinne I.Prague: Calve.
   Tyler, C.W. (1978). Some new entoptic phenomena. Vision Research, 18, 1633-1639.

Dictionary of Hallucinations. . 2010.

Look at other dictionaries:

  • convergence phosphene —    A term used to denote a *phosphene (i.e. seeing stars ) arising physiologically in association with convergence of the eyes. In 1978 the American neuroscientist Christopher W. Tyler proposed a distinction between two types of convergence… …   Dictionary of Hallucinations

  • closed-eye hallucination —    Also known as closed eye visual hallucination and closed eye visualization. All three terms are used to denote a type of *visual hallucination experienced exclusively when the eyes are closed or when there is perfect darkness around. Some… …   Dictionary of Hallucinations

  • flick phosphene —    Also known as eye movement phosphene. The term flick phosphene was introduced in or shortly before 1957 by the American ophthalmologist Bernard R. Nebel, who had observed the concomitant phenomenon in himself. The term is used to denote a type …   Dictionary of Hallucinations

  • dumbbell phosphene —    Also known as dumbbell shaped phosphene. Both terms are used to denote a type of phosphene (i.e. seeing stars ) that may arise after sustained convergence of the eyes, especially with closed eyes against an illuminated background. The name… …   Dictionary of Hallucinations

  • Moore's lightning streaks —    The eponym Moore s lighting streaks refers to a subclass of the group of *phosphenes characterized by brief, vertical flashes of light in the temporal field of one eye, typically occurring in the dark, and typically elicited by acceleration of …   Dictionary of Hallucinations

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