Moreover, as part of our survival mechanism, the stress response is supposed to dilate the pupils in the eyes so that they can take in more visual information when danger is perceived. Because elevated stress can adversely affect the nervous system and how the sensory organs function, stress, including anxiety-caused stress, and a lack of sleep can affect the size of the pupils in the eyes. The eyes are a sensory organ that function in conjunction with the nervous system. Your pupil size can also change in episodes, where it’s extreme one moment and barely noticeable the next.ĭilated or contracted pupils can change from day to day, and/or from moment to moment.Īll of the above combinations and variations are common. The change in pupil size can range in degrees from slight, to moderate, to extreme. For example, you may notice a change in the size of your pupils once and a while and not that often, notice it off and on, or experience it persistently.ĭilated or contracted pupils may precede, accompany, or follow an escalation of other anxiety sensations and symptoms, or occur by itself.ĭilated or contracted pupils can precede, accompany, or follow an episode of nervousness, anxiety, fear, and elevated stress, or occur ‘out of the blue’ and for no apparent reason. For some people, the constriction can be so significant that the pupil is barely noticeable.ĭilated or contracted pupils can come and go rarely, occur frequently, or persist indefinitely.
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