Approximately one in twenty adults suffer from a misalignment of the eyes. Higher risk groups may include those who:
- Have undergone eye surgery to realign their eyes in childhood
- Suffer from circulatory conditions, such as high blood pressure and diabetes
- Have suffered a trauma to the head, which may be caused by a fall or road traffic accident
- On rare occasions strabismus can be caused by direct pressure on the nerves due to a tumour.