Common causes of red blood clots in the eyes include spontaneous conjunctival blood vessel rupture, hematologic disorders, trauma or surgery.
1. Spontaneous rupture of conjunctival blood vessels: Most common in the elderly, usually in combination with other diseases, such as hypertension, diabetes mellitus or other cardiovascular diseases, which can lead to rupture of subconjunctival blood vessels, resulting in the appearance of a red blood clot in the eye.
2. Blood system diseases: aplastic anemia, leukemia, thrombocytopenic purpura, coagulation disorders and other diseases may also lead to a red blood clot in the eye, the patient in addition to conjunctival hemorrhage, but also accompanied by bleeding in other parts of the body.
3. Trauma or surgery: when the small blood vessels under the conjunctiva rupture due to external force, it will be manifested as point or piece of hemorrhage, which is common in eye trauma or eye surgery. Some patients rub their eyes hard because of itchy eyes, which may lead to rupture of small blood vessels under the conjunctiva.
The appearance of red blood clots in the eyes, should promptly seek medical attention, under the guidance of the doctor for examination and treatment.