by 
Firebrand
ANSWERS: 1
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taken from wikipedia: The size of the pupils may reveal a great deal about a person's current state. Strong emotions, convictions, and moods often stimulate the sympathetic nervous system and cause dilation of the pupils. In response to a threat or fear, this is often called the fight or flight response, and has an effect on the appearance of the eye. The pupil may dilate if a person sees something (or someone) of interest or is aroused, thus making eye contact much more intense than it already is. Studies have shown that humans (especially females) are judged as more attractive if their pupils are more dilated than is normal; belladonna was and sometimes is still used cosmetically in some cultures to provoke pupil dilation.
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