What is the medical term for contraction of pupil?

The medical term for constriction of the pupil is miosis. This can occur for a variety of reasons, including:

- Normal reaction to light: The pupils naturally constrict when exposed to bright light to reduce the amount of light entering the eye.

- Certain medications: Some medications, such as opioids, can cause miosis as a side effect.

- Medical conditions: Some medical conditions, such as Horner's syndrome and Adie's tonic pupil, can also cause miosis.

In most cases, miosis is not a serious medical condition and does not require treatment. However, if you experience sudden or severe miosis, it is important to see a doctor to rule out any underlying medical problems.