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.
The Millau Viaduct is a cable-stayed road-bridge that spans the valley of the river Tarn near Millau in southern France.Designed by the French structural engineer Michel Virlogeux and British architect Norman Foster, it is the tallest bridge in the world, with one mast's summit at 343.0 metres (1,125 ft).The viaduct is part of the A75-A71 autoroute axis from Paris to Montpellier.Construction cost was approximately â¬400 million.esigned by the French structural engineer Michel Virlogeux and British architect Norman Foster, it is the tallest bridge in the world, with one mast's summit at 343.0 metres (1,125 ft). The viaduct is part of the A75-A71 autoroute axis from Paris to Montpellier. Construction cost was approximately â¬400 million.