There is a red blood clot in my eye. What happened?

How does red blood clot appear in the eye? The outermost layer of our eyeball is white sclera tissue, sclera is covered with transparent bulbar conjunctiva, bulbar conjunctiva has blood vessels, blood vessel texture is clear. If trauma, drinking, cough, vomiting, conjunctivitis, hypertension, arteriosclerosis, diabetes, nephritis, blood disease, these factors will cause bulbar conjunctiva blood vessels rupture or permeability increase, causing bulbar conjunctival hemorrhage, red blood clot is conjunctival hemorrhage. Will be in the conjunctiva was massive, group-like bleeding focus, serious words will also cause conjunctival hematoma. Treatment, to investigate systemic diseases. For primary disease treatment, bleeding early local cold compress two days later changed to hot compress, twice a day. Vitamin C, Yunnan Baiyao capsule oral hemostatic treatment. If you find red blood clots in your eyes, I suggest you go to the hospital early for vision examination, fundus examination, because conjunctival hemorrhage is a precursor to some fundus bleeding, hypertension, diabetes caused by hypertensive retinopathy, diabetic retinopathy will cause fundus bleeding, retinal vein obstruction.