Strabismus, or crossed eyes, is when the eyes look in different directions due to weak eye muscle control. It affects both children and adults and can result from medical conditions, eye injuries, or diseases. Specific names describe how the eyes drift:
- Esotropia: Eyes turn inward
- Exotropia: Eyes turn outward
- Hypertropia: Eyes turn upward
- Hypotropia: Eyes turn downward
The drifting of the eyes can be constant or intermittent.