The pathophysiology of this process occurs because the veins above the heart have no valves. A rapid rise in the abdominal pressure induces a rapid rise in the intravenous pressure, and various vessels inside or around the eye may rupture7 . Various straining activities such as heavy lifting, coughing, vomiting, blowing balloons and straining on a stool if constipated frequently lead to subconjunctival haemorrhages.
There were 102,538 records for eye injuries or foreign bodies in the eye in the VEMD database for the period 1999–06 (6.0% of the total number of records contained in the VEMD). Of these, most (97.3%, n = 99,747) were treated in the emergency department (ED) without admission to hospital.
The treatment required to use eyedrops, such as artificial tears, to soothe any scratchy feeling you have in your eye. Beyond that, the blood in your eye will absorb within about one to two weeks, and you'll need no treatment. Ongoing Research is being done at Subconjunctival hemorrhage centres.