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 was the great rivalry between the communist Soviet Union and its allies against the United States and its Western allies that began after World War II. The creation of NATO helped prevent the Cold War from becoming a hot war that would have led the world to nuclear Armageddon.he Cold War was the great rivalry between the communist Soviet Union and its allies against the United States and its Western allies that began after World War II. The creation of NATO helped prevent the Cold War from becoming a hot war that would have led the world to nuclear Armageddon.