If you use drugs like cocaine, marijuana, or amphetamines, for instance, your pupils may become considerably bigger (a condition known as mydriasis), but opiates like heroin will cause the pupils to constrict (Miosis).
How does marijuana affect pupil size?
In a study with 10 participants, it was shown that smoking marijuana caused a dose-related narrowing of the pupil in response to low photopic light levels, but drinking alcohol had no impact on the size of the pupil. The combined effects of the two medications had no effect on the diameter of the pupils.
Do drugs affect your pupils?
- The small dark specks that congregate in the middle of the whites of your eyes are called pupils.
- It is possible for different types of drugs to have varying effects on the size of a person’s pupils.
- Some can also impair eye motility, create watery eyes, and produce redness of the eyes, which is a well-known symptom of marijuana usage.
- [Citation needed] Alterations in the size of the pupils are not always an indicator of drug usage.
Why does cannabis make your eyes dilate?
The reason for this is because cannabis contains a compound known as tetrahydrocannabinol (THC), which has been shown to reduce one’s blood pressure. This has the potential to induce the blood vessels in the eyes to become more open.
How does alcohol affect your pupils?
The size of one’s pupils after using marijuana and alcohol In a study with 10 participants, it was shown that smoking marijuana caused a dose-related narrowing of the pupil in response to low photopic light levels, but drinking alcohol had no impact on the size of the pupil. The combined effects of the two medications had no effect on the diameter of the pupils.
