Red eye/Sub Conjunctival Haemorrhage
A red eye can be alarming but is commonly just a sign of conjunctivitis or another minor eye condition. If it is painful, there may be a more serious problem.
Sub Conjunctival Haemorrhage
A subconjunctival haemorrhage is one cause of a red eye. It is caused by a small bleed behind the conjunctiva. It can look alarming, but it usually causes no symptoms and is usually harmless. The redness usually clears within two weeks.