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.
Libya war raises new doubts over why NATO exists. March 31, 2011 | By Ron Smith. It was said upon the creation of the North Atlantic Treaty Organization in April of 1949 that NATO's purpose was three-fold: to keep the Russians out, the Americans in and the Germans down.ibya war raises new doubts over why NATO exists. March 31, 2011 | By Ron Smith. It was said upon the creation of the North Atlantic Treaty Organization in April of 1949 that NATO's purpose was three-fold: to keep the Russians out, the Americans in and the Germans down.