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"At night, why does it take my eyes several minutes to get used to darkness?." 01 April 2000. HowStuffWorks.com. <http://health.howstuffworks.com/question53.htm> 17 May 2008.
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Please copy/paste the following text to properly cite this How Stuff Works article:
"At night, why does it take my eyes several minutes to get used to darkness?." 01 April 2000. HowStuffWorks.com. <http://health.howstuffworks.com/question53.htm> 17 May 2008.
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