Landolt's rings (

См. также в других словарях:

• Landolt ring — Lan·dolt ring län dōlt .riŋ n one of a series of incomplete rings or circles used in some eye charts to determine visual discrimination or acuity Landolt Edmond (1846 1926) French ophthalmologist. Landolt and Louis de Wecker (1832 1906) published …   Medical dictionary

• landolt ring — noun Usage: usually capitalized L Etymology: after Edmond Landolt died 1926 French ophthalmologist : one of a series of incomplete rings or circles used in studying visual discrimination or acuity …   Useful english dictionary

• Landolt rings — broken rings used in testing of visual acuity, the width of the ring and the break in its continuity each being one fifth of its overall diameter; the observer is to identify the orientation of the break, with the ability to identify a break… …   Medical dictionary

• anillo de Landolt — Eng. Landolt s rings Ver Test de los optotipos de Landolt …   Diccionario de oftalmología

• anillos quebrados de Landolt — Eng. Landolt s broken rings Ver prueba de los optotipos de Landolt …   Diccionario de oftalmología

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• Crystallographic defect — Crystalline solids exhibit a periodic crystal structure. The positions of atoms or molecules occur on repeating fixed distances, determined by the unit cell parameters. However, the arrangement of atom or molecules in most crystalline materials… …   Wikipedia