Causes
Trauma, high blood pressure, clotting disorders, intraocular inflammation (uveitis), tumours. It is often a sign of a general problem.
Diagnosis
Ophthalmic examination plus a search for the underlying cause (measuring blood pressure, clotting tests).
Treatment
Treatment of the underlying cause and of the eye. Acting quickly is important to preserve vision and to detect the general problem causing it.
Prevention
Control high blood pressure and clotting disorders, and prevent trauma.

