Search results
Results from the WOW.Com Content Network
Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
The Croix-de-Feu (French: [kʁwa də fø], Cross of Fire) was a nationalist French league of the Interwar period, led by Colonel François de la Rocque (1885–1946). After it was dissolved, as were all other leagues during the Popular Front period (1936–38), La Rocque established the Parti social français (PSF) to replace it.
Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
Jean de Saboulin was a deputy representing the nobility at the General Assembly of the State of the Basque Country in 1789. [23] Since the second part of the 18th century the family was settled in Nice and Aix-en-Provence, [24] where the oldest branch lived in the castle of Lanfant near Luynes. [25] Other branches lived in Barjac, Lozère at ...
There are species of fish and cobra snakes that use spit as a defense mechanism, which makes their saliva literally necessary for survival. Llamas and alpacas don't spit venom, but their spit can ...
A lensmeter or lensometer (sometimes even known as focimeter or vertometer), [1] [2] is an optical instrument used in ophthalmology. It is mainly used by optometrists and opticians to measure the back or front vertex power of a spectacle lens and verify the correct prescription in a pair of eyeglasses, to properly orient and mark uncut lenses ...
Battery Moltke ( Batterie Moltke in German) is an uncompleted World War II former coastal artillery battery in St Ouen in north-west Jersey. [1] It was constructed by Organisation Todt for the Wehrmacht during the occupation of the Channel Islands . The battery structures include bunkers, gun emplacements and the Marine Peilstand 3 tower, which ...
François de La Rocque (French: [fʁɑ̃swa dəlaʁɔk]; 6 October 1885 – 28 April 1946) was the leader of the French right-wing league the Croix de Feu from 1930 to 1936 before he formed the more moderate nationalist French Social Party (1936–1940), which has been described by several historians, such as René Rémond and Michel Winock, as a precursor of Gaullism.