Yahoo! Answers: Answers and Comments for Any way to shrink pupil without light? [Optical] Copyright © 2012 Yahoo! Asia Pacific Pte Ltd. (Co. Reg. No. 199700735D). All Rights Reserved. http://ph.answers.yahoo.com/question/index?qid=20120405212914AADldgJ From Creepyeyes en-ph Wed, 19 Jun 2013 01:52:33 GMT 3 Yahoo! Answers: Answers and Comments for Any way to shrink pupil without light? [Optical] 142 18 http://ph.answers.yahoo.com/ http://l.yimg.com/sc/28206/answers1/images/a/i/ph/se/an/ph_answersim_logo.gif From Broccoli: Okay, I don't know why you would want to do this but ... http://ph.answers.yahoo.com/question/index?qid=20120405212914AADldgJ http://ph.answers.yahoo.com/question/index?qid=20120405212914AADldgJ Fri, 06 Apr 2012 01:02:22 GMT Okay, I don't know why you would want to do this but whatever you're into! Em... Fear is supposed to cause your pupils to shrink, but you probably don't want to go intentionally scaring yourself just for some physical effect like that, especially if it's something you're just doing for your own amusement.