obscuration

obscuration
   The term obscuration comes from the Latin adjective obscurus, which means dark. It translates as 'darkening'. The term is used to denote a transient loss of visual perception. Such losses of visual perception typically last no longer than a few seconds. Pathophysiologically, obscuration is associated with compression of the optic nerve head perfusion, which is in turn attributed to raised intracranial pressure, as in sneezing, coughing, and straining. Etiologically, obscuration is associated primarily with papilledema and optic disc drusen. Conceptually as well as phenomenologically, obscuration should not be confused with *scieropia, *scierneuropsia, and * achromatopsia.
   References
   Kosmorsky, G.S., Rosenfeld, S.I., Burde, R.M. (1985). Transient monocular obscuration-? amaurosis fugax: A case report. British Journal ofOphthalmology, 69, 688-690.

Dictionary of Hallucinations. . 2010.

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  • obscuration — ⇒OBSCURATION, subst. fém. A. ASTRON. Obscurcissement provoqué par une éclipse. (Dict. XIXe et XXe s.). P. métaph. Mes dispositions intérieures (...) sont toujours tristes et mes facultés intellectuelles toujours embarrassées, tantôt précipitées,… …   Encyclopédie Universelle

  • Obscuration — Ob scu*ra tion, n. [L. obscurativ: cf. F. obscuration. See {Obscure}, v. t. ] The act or operation of obscuring; the state of being obscured; as, the obscuration of the moon in an eclipse. Sir J. Herschel. [1913 Webster] …   The Collaborative International Dictionary of English

  • obscuration — I noun adumbration, blackout, blur, cloud, concealment, darkening, darkness, dimming, dimness, disappearance, faintness, fogginess, fuzziness, gloom, gloominess, indistinctness, obfuscation, obliteration, obscurity, occupation, opacity,… …   Law dictionary

  • obscuration — (n.) late 15c., from L. obscurationem (nom. obscuratio) a darkening, obscuring, noun of action from pp. stem of obscurare (see OBSCURE (Cf. obscure) (v.)) …   Etymology dictionary

  • obscuration — [äb΄skyo͞o rā′shən] n. [L obscuratio] an obscuring or being obscured …   English World dictionary

  • OBSCURATION — n. f. T. d’Astronomie Obscurcissement causé par une éclipse. La période d’obscuration …   Dictionnaire de l'Academie Francaise, 8eme edition (1935)

  • obscuration — /ob skyoo ray sheuhn/, n. 1. the act of obscuring. 2. the state of being obscured. [1425 75; late ME < L obscuration (s. of obscuratio) a darkening, equiv. to obscurat(us), ptp. of obscurare (obscur(us) dark + atus ATE1) + ion ION; see ATION] * * …   Universalium

  • obscuration — /ɒbskjuˈreɪʃən/ (say obskyooh rayshuhn) noun 1. the act of obscuring. 2. the state of being obscured. {Latin obscūrātiōn , stem of obscūrātiō} …  

  • obscuration — obscure ► ADJECTIVE (obscurer, obscurest) 1) not discovered or known about; uncertain. 2) not well known. 3) not clearly expressed or easily understood. 4) hard to make out; indistinct. ► VERB ▪ conceal or make unclear …   English terms dictionary

  • obscuration — ˌäbzkyəˈrāshən, bsk noun ( s) Etymology: Middle English, from Latin obscuration , obscuratio, from obscuratus (past participle of obscurare to obscure) + ion , io ion : an act of obscuring or the quality or state of being obscured …   Useful english dictionary

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