Snellen chart. A wall chart developed by a Dutch ophthalmologist Hermann Snellen in the 19th century, which is still used today to measure visual acuity. It consists of 11 lines of block letters of decreasing size, which are to be read at a distance of 6 metres (20 feet).
See bridge in maps. Pont de Normandie is a cable-stayed road bridge that crosses the river Seine and contect Le Havre to Honfleur in Normandy, in France. The bridge was designed by Michel Virlogeux. Construction began in 1988 and the bridge was opened in January 1995.
Peyrepertuse is a ruined fortress and one of the Cathar castles of the Languedoc located high in the French Pyrenees pyrÃ©nÃ©es in the commune Of-duilhac-Sous, peyrepertuse in The aude. Departement dÃ©partement it was associated With the Counts of Narbonne. And barcelona it stands at. 800m highhe Chateau chÃ¢teau De (Puilaurens: occitan Lo castel CastÃ¨l-De) pueg puÃ¨g laurenc laurenÃ§ Is One of the Cathar castles of the languedoc in What is Now. The south of france it is located In-The commune of Lapradelle puilaurens. in the aude departement dÃ©partement