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Pupil Size Changes

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Answers to Common Questions
This happens because the muscles in the iris (the coloured part) close in to make the pupil smaller when there is to much light to protect the little cells in your eyes. It also happens vice versa to make the pupil bigger when there is litt...
http://wiki.answers.com/Q/Causes+changes+in+size+of+th...   See entire page »
As it gets darker, pupils get bigger. (They also get bigger when viewing something the person likes)
http://wiki.answers.com/Q/How+does+a+pupil+size+change...   See entire page »
Rosenfield M , Aggarwala KR , Raul C , Ciuffreda KJ .
http://www.ncbi.nlm.nih.gov/pubmed/7714317   See entire page »
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Answers to Other Common Questions
Some people's pupils and eye colors may change when showing an extreme emotion. ChaCha for now!
http://www.chacha.com/question/do-pupil-changes-in-size...
No, the cut-out for the pupil will remain the same in any lighting condition. It does not expand and contract like your pupil. For this reason, colored contacts, to me anyway, look very unnatural because even in dark rooms and out in broad ...
http://answers.yahoo.com/question/index?qid=20070622001...
If your in your teens anti-deprssants can make you feel worse. you really need to see you DR!
http://answers.yahoo.com/question/index?qid=20080610234...
Your pupils are the black spot in the center of a muscle called the 'Iris" (the colored part). It is the iris that dilates and constricts depending upon the amount of light in your environment. The more light, the more this muscle cont...
http://uk.answers.yahoo.com/question/index?qid=20090228...
Pupil - Wikipedia, the free encyclopedia - At this stage the pupils do not remain completely still, therefore may lead in proportion to a person's pupil size change response to that in another. TutorVista Pupil Pupil is the small circular o...
http://www.tutorvista.com/ks/why-do-pupils-change-size
It changes to control the ammount of light entering the eye. This allows you to see in bright and dim light.
http://wiki.answers.com/Q/Why_does_the_size_of_a_pupil_...
Your pupils, small openings in the cornea of your eye (to allow light to pass through to the retina, which sends images to your brain) will increase and decrease in size depending on the amount of light you're in. The darker it is, the bigg...
http://wiki.answers.com/Q/Can+eye+drops+change+your+pup...
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