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What Is Retinal Hemorrhage?

A retinal hemorrhage is bleeding within or on the surface of the retina, the light sensitive tissue at the back of the eye. Blood can collect in different layers, creating dot, blot, flame shaped, or preretinal hemorrhages. Some hemorrhages are small and found only on examination, while others cause floaters or blurred vision. They often reflect underlying vascular or blood disorders, such as diabetes, hypertension, or blood dyscrasias. Identifying the pattern and cause is important for eye and overall health.

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What Is Retinal Hemorrhage?

A retinal hemorrhage is bleeding within or on the surface of the retina, the light sensitive tissue at the back of the eye. Blood can collect in different layers, creating dot, blot, flame shaped, or preretinal hemorrhages. Some hemorrhages are small and found only on examination, while others cause floaters or blurred vision. They often reflect underlying vascular or blood disorders, such as diabetes, hypertension, or blood dyscrasias. Identifying the pattern and cause is important for eye and overall health.

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Types and Appearance

Flame shaped hemorrhages lie in the nerve fiber layer and follow its striated pattern, often seen in hypertensive retinopathy. Dot and blot hemorrhages sit deeper in the inner nuclear and outer plexiform layers and are typical of diabetic retinopathy. Preretinal hemorrhages form boat shaped pools between the retina and posterior hyaloid, and subretinal hemorrhages lie beneath the neurosensory retina. Multiple layers can be involved in severe trauma or vascular occlusions. The distribution of bleeding offers clues to the underlying condition.

Common Causes and Associations

Chronic hypertension and diabetes are leading systemic causes of retinal hemorrhages, through damage to small retinal vessels. Retinal vein occlusions, anemia, leukemia, and clotting disorders can also produce widespread bleeding. Sudden rises in venous pressure from heavy lifting, coughing, or labor can cause isolated premacular hemorrhages in otherwise healthy individuals. In infants, retinal hemorrhages may be associated with birth trauma or, in concerning patterns, nonaccidental injury. A thorough medical history is essential.

Symptoms and Diagnosis

Small peripheral hemorrhages often cause no symptoms and are discovered during routine dilated examination. Larger or centrally located hemorrhages can blur vision, cause scotomas, or produce floaters if blood reaches the vitreous. Fundus examination, fundus photography, and optical coherence tomography document the extent and layers involved. Fluorescein angiography may be used to assess associated ischemia or leakage. Laboratory studies and systemic evaluation are guided by suspected causes.

Management and Outlook

Treatment focuses on the underlying disease rather than the hemorrhage itself. Improving blood pressure and glucose control, addressing vein occlusions, or treating blood disorders can reduce further bleeding. Some premacular or submacular hemorrhages are treated with intravitreal injections, gas displacement, or surgery to protect central vision. Many small hemorrhages clear gradually as blood is resorbed. Prognosis depends on the cause, location, and extent of bleeding and on how well systemic risk factors are managed.

FAQs About Retinal Hemorrhage

Can stress alone cause retinal hemorrhages?

Stress by itself is not a usual cause, but related blood pressure spikes or strain can contribute in susceptible people.

Will a retinal hemorrhage make me go blind?

Most small hemorrhages do not cause blindness, but extensive or central bleeding can threaten vision if disease is not treated.

How long does it take for a retinal hemorrhage to clear?

Resorption can take weeks to months, depending on size and location.

Do I need emergency care for every retinal hemorrhage?

Emergency care is needed when there is sudden vision loss, trauma, or concern for serious systemic disease; otherwise, prompt but nonemergent evaluation is typical.

References

NCBI Bookshelf. ?Retinal Hemorrhage.? https://www.ncbi.nlm.nih.gov/books/NBK560777/

Cleveland Clinic. ?Retinal Hemorrhage: Symptoms, Causes & Treatment.? https://my.clevelandclinic.org/health/diseases/25106-retinal-hemorrhage

National Eye Institute (NIH). ?Diabetic Retinopathy.? https://www.nei.nih.gov/eye-health-information/eye-conditions-and-diseases/diabetic-retinopathy

EyeWiki. ?Hypertensive Retinopathy.? https://eyewiki.org/Hypertensive_Retinopathy

Merck Manual Professional Edition. ?Hypertensive Retinopathy.? https://www.msdmanuals.com/professional/eye-disorders/retinal-disorders/hypertensive-retinopathy