We know that stress levels can be measured in a variety of ways, but none of them are definitive. High blood pressure and high pulse rate can be the results of a plethora of circumstances, from lifestyle to hereditary traits. A heart attack? The same thing. While doctors can tell you to watch your stress levels, they often aren't sure whether they're as high as other contributing factors in a patient's life--especially if the patient is dishonest about health history.
Enter the science of pupils! Apparently your pupils, when studied while you multi-task, are better at revealing just how stressed out you are. Not only can this information be helpful in treating patients, but it also might be useful in creating environments without as much stress in them to begin with.
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