Mydriasis (/máµ»ËdraÉª.ÉsÉªs/) is the dilation of the pupil, usually defined as when having a non-physiological cause, but sometimes defined as potentially being a physiological pupillary response. Non-physiological causes of mydriasis include disease, trauma, or the use of drugs. Normally, as part of the pupillary light reflex, the pupil dilates in the dark and constricts in the light to respectively improve vividity at night and to protect the retina from sunlight damage during the day.
The Cold War Museum. The Strategic Defense Initiative (SDI): Star Wars. The Strategic Defense Initiative (SDI), also known as Star Wars, was a program first initiated on March 23, 1983 under President Ronald Reagan. The intent of this program was to develop a sophisticated anti-ballistic missile system in order to prevent missile attacks from other countries, specifically the Soviet Union.
The Cold War. The seeds of hostility between the United States and the USSR began near the end of World War I. The Bolsheviks (later Communists) overthrew the existing Russian government. In December 1922 began the formation of the Union of Soviet Socialist Republics (USSR) under Communist control.his event ends America's monopoly of atomic weaponry and launches the Cold War. In the 1950's, The Arms Race became the focus of the Cold War. America tested the first Hydrogen (or thermo-nuclear) bomb in 1952, beating the Russians in the creation of the Super Bomb.