BIOLOGY | MEDICAL | HEALTH on Instagram: "No, you cannot control your pupil size directly; pupil dilation and constriction are involuntary reflexes regulated by the autonomic nervous system in response to light and emotional states. However, some people can learn to change their pupil size indirectly by inducing changes in arousal, focusing their attention, or shifting their focus to near or far objects. The instagram post highlights a rare ability where an individual can consciously control the