Pupil constriction

Pupil constriction (also called pinpoint pupils or miosis) is the reduction of the size of a person's pupils under normal lighting conditions. Pupil constriction decreases a person's ability to see in low light conditions. This effect generally occurs on opioids.

Psychoactive substances

Compounds within our psychoactive substance index which may cause this effect include:

See also

• Subjective effects index
• Psychedelics - Subjective effects
• Dissociatives - Subjective effects
• Deliriants - Subjective effects
• Pupil dilation