Plácido's disk

Plácido's disk
/plah"si dohz'/, Ophthalm.
a device marked with concentric black rings, used to detect corneal irregularities.
[after A. Plácido da Costa (1848-1916), Portuguese ophthalmologist, who devised it]

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Universalium. 2010.

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  • Plácido's disk — /plah si dohz /, Ophthalm. a device marked with concentric black rings, used to detect corneal irregularities. [after A. Plácido da Costa (1848 1916), Portuguese ophthalmologist, who devised it] …   Useful english dictionary

  • Placido disk — Pla·ci·do disk (plahґse do) [Antonio Placido da Costa, Portuguese ophthalmologist, 1848–1916] see under disk …   Medical dictionary

  • disk — 1. A round, flat plate; any approximately flat circular structure. 2. SYN: lamella (2). 3. In dentistry, a circular piece of thin paper or other material, coated with an abrasive substance, used for cutting and polishing tee …   Medical dictionary

  • Placido da Costa — Antonio, Portuguese ophthalmologist, 1848–1916. See P. disk …   Medical dictionary

  • disco de Plácido — Eng. Placido s disk Ver queratoscopio …   Diccionario de oftalmología

  • Placido disk — keratoscope …   Medical dictionary

  • Corneal topography — Intervention A corneal topogram of an eye affected by keratoconus. Blue shows the flattest areas, and red the steepest. MeSH …   Wikipedia

  • Keratoscope — A keratoscope, sometimes known as Placido s disk , is an ophthalmic instrument for assessing the shape of the anterior surface of the cornea. A series of concentric rings are projected onto the cornea and their reflection viewed by the examiner… …   Wikipedia

  • Keratoconus — Classification and external resources The conical cornea that is characteristic of keratoconus ICD 10 H …   Wikipedia

  • corneal reflex — 1. Physiol. the closing of the eyelids induced by touching the cornea lightly. 2. Ophthalm. the reflection of a keratoscope, as Placido s disk, on the surface of the cornea. * * * …   Universalium

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