scintillating scotoma

(redirected from Fortification spectrum)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Fortification spectrum: Fortification Figure
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.scintillating scotoma - a localized area of diminished vision edged by shimmering colored lights; in many people it indicates the onset of migraine
scotoma - an isolated area of diminished vision within the visual field
References in periodicals archive ?
This sensation is followed, in seconds to minutes, by the appearance of a small central scotoma of only a few degrees that is lined on one side with a luminous, zigzag line, termed the fortification spectrum. The spectral lines usually form an acute angle and are nonconfluent.