annular scotoma


annular scotoma
a circular scotoma surrounding the point of fixation; called also ring s.

Medical dictionary. 2011.

Look at other dictionaries:

  • annular scotoma — noun a circular scotoma surrounding the center of the field of vision • Hypernyms: ↑scotoma …   Useful english dictionary

  • scotoma —    Also known as negative scotoma. The term scotoma comes from the Greek noun skotos (darkness). It is used to denote an area or island of loss or impairment of vision, surrounded by a field of normal or relatively well preserved vision. In… …   Dictionary of Hallucinations

  • scotoma — 1. An isolated area of varying size and shape, within the visual field, in which vision is absent or depressed. 2. A blind spot in psychological awareness. [G. skotoma, vertigo, fr. skotos, darkness] absolute s. a s. in which there is no… …   Medical dictionary

  • ring scotoma — annular s …   Medical dictionary

  • Leber's Congenital Amaurosis (LCA) and hallucinations —    The eponym Leber s congenital amaurosis refers to the German ophthalmologist Theodor Karl Gustav von Leber (1840 1917), who was the first to describe the concomitant condition in 1869. LCA is considered a type of amaurosis, due to an autosomal …   Dictionary of Hallucinations

  • List of anatomical topics — This page aims to list articles related to anatomy. This list is not necessarily complete or up to date if you see an article that should be here but isn t (or one that shouldn t be here but is), please update the page accordingly. NOTOC A… …   Wikipedia


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