A member asked:

Is it weird that i can control the dilation of my pupils?

A doctor has provided 1 answer

See below: One could influence the size of their pupils via a variety of (illicit and/or prescription) pharmacological and/or emotional strategies targeting upregulation of the adrenergic system. Examples include, but are not limited to, sympathomimetic medications (eg stimulants), and manufactured anxiety/fear. Engaging in such behavior solely to influence pupillary dilation is not recommended.

Answered 9/2/2013

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