The opposite of dilated eyes is constricted pupils, also known as miosis.
Understanding Pupil Size and Miosis
Pupil size is controlled by muscles in the iris. When these muscles contract, the pupil gets smaller, and this is called miosis or pupillary constriction. Dilation, on the other hand, refers to the enlargement of the pupil.
Abnormal Miosis
As mentioned in the provided reference, sometimes pupils stay small even in dim light. This can indicate an underlying issue and is termed abnormal miosis.
When your pupil shrinks (constricts), it's called miosis. If your pupils stay small even in dim light, it can be a sign that things in your eye aren't working the way they should. This is called abnormal miosis, and it can happen in one or both of your eyes.
Factors Affecting Pupil Size
Several factors can influence pupil size, including:
- Light levels: Pupils constrict in bright light and dilate in dim light.
- Medications: Certain medications can cause either dilation or constriction.
- Medical conditions: Some neurological or eye conditions can affect pupil size.
- Emotional state: Strong emotions can sometimes cause pupils to dilate.
Summary Table
| Feature | Dilated Eyes (Mydriasis) | Constricted Eyes (Miosis) |
|---|---|---|
| Pupil Size | Enlarged | Reduced |
| Common Causes | Dim light, medications | Bright light, medications |
