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.
The incubation period of WNV ranges from 3 to 14 days. About 80% of human infections are apparently asymptomatic. Only approximately 20% of persons infected become symptomatic with a self-limited febrile illness in most cases. Symptoms of affected patients include high-grade fever, headache, myalgia, arthralgia, malaise, nausea, vomiting, skin rash, weakness, andpharyngitis.
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.