An eye hemorrhage is bleeding that occurs in or on the eye when a small blood vessel breaks. The most common type, a subconjunctival hemorrhage, appears as a bright red patch on the white of the eye and is almost always harmless, resolving on its own within 7 to 14 days. But bleeding can also happen deeper inside the eye, where it may affect vision and require treatment. The type of hemorrhage, and how seriously you need to take it, depends entirely on where the bleeding occurs.
Types of Eye Hemorrhage
Not all eye bleeding is the same. The location of the hemorrhage determines whether it’s a cosmetic nuisance or a potential threat to your vision.
Subconjunctival Hemorrhage
This is the most common and least serious type. A tiny blood vessel breaks just beneath the conjunctiva, the thin clear membrane covering the white of your eye. The result is a vivid red or dark patch that can look alarming but causes no pain, no vision changes, and no lasting damage. You might not even notice it until you look in a mirror or someone points it out. Most cases clear up within 1 to 2 weeks without any treatment, with the discoloration gradually fading as your body reabsorbs the blood. Larger patches can take up to 21 days to fully resolve.
Hyphema
A hyphema is bleeding inside the front chamber of the eye, between the clear dome-shaped cornea and the colored iris. Unlike a subconjunctival hemorrhage, a hyphema is usually painful. It often causes blurry or blocked vision in the affected eye, along with sensitivity to light. Hyphemas most commonly result from a direct blow to the eye, such as a sports injury or accident, which tears structures in the iris or pupil. This type of hemorrhage needs prompt medical attention because blood pooling in the front of the eye can raise eye pressure and damage internal structures.
Vitreous Hemorrhage
The vitreous is the gel-like substance that fills the large central cavity of the eye. When blood leaks into this space, it blocks light from reaching the retina at the back of the eye. People with vitreous hemorrhage often notice a sudden increase in floaters, cobweb-like shadows, or a reddish tint to their vision. Symptoms tend to be worse in the morning and improve throughout the day, because the blood settles to the bottom of the eye while you’re upright. This type of hemorrhage is frequently linked to conditions like diabetic eye disease and retinal vein blockages.
Retinal Hemorrhage
Bleeding that occurs in or beneath the retina itself is the most concerning type. The retina is the light-sensitive layer at the back of the eye responsible for sending visual signals to the brain. Retinal hemorrhages can cause sudden vision loss or blind spots and are often a sign of an underlying condition such as uncontrolled high blood pressure, diabetes, or a blood vessel blockage. Left untreated, retinal hemorrhages can lead to complications including retinal detachment and permanent vision impairment.
Common Causes and Risk Factors
The causes of eye hemorrhage range from completely trivial to medically significant, depending on the type. A subconjunctival hemorrhage can happen from something as minor as sneezing, coughing, straining, or rubbing your eye too hard. Sometimes there’s no identifiable cause at all.
Deeper hemorrhages tend to have more specific triggers. Direct trauma to the eye or face is one of the most common causes, particularly for hyphemas. For vitreous and retinal hemorrhages, the cause is often a chronic condition that weakens or damages blood vessels over time. High blood pressure, diabetes, and blockages in the retinal veins are leading culprits. Diabetic eye disease, in particular, causes fragile new blood vessels to grow on the retina that rupture easily.
Blood-thinning medications, including aspirin and prescription anticoagulants, increase the risk of spontaneous bleeding throughout the body, and the eye is no exception. People taking these medications may experience subconjunctival hemorrhages more frequently, and internal eye bleeding may be harder to control. Bleeding disorders and other conditions that affect clotting also raise the risk.
Painless vs. Painful: How to Tell What You Have
The simplest way to gauge the seriousness of eye bleeding is to ask yourself two questions: does it hurt, and has your vision changed?
A subconjunctival hemorrhage is painless and purely cosmetic. Your vision stays completely normal. You see a red patch on the white of your eye, and that’s it. A broken blood vessel on the surface of the eye and a hyphema can look similar at first glance, but the difference is clear: a hyphema causes pain, light sensitivity, and cloudy or blocked vision. If you have any of those symptoms alongside visible blood in or around your eye, the bleeding is likely internal and needs evaluation.
Vitreous and retinal hemorrhages may not cause any pain at all, but they do affect vision. New floaters, dark spots, streaks, hazy vision, or sudden partial vision loss are all signs that bleeding is happening inside the eye rather than on its surface.
How Eye Hemorrhages Are Diagnosed
For a straightforward subconjunctival hemorrhage, diagnosis is visual. A doctor can confirm it just by looking at your eye. Internal hemorrhages require more involved examination. An eye doctor will typically use a slit lamp, a specialized microscope that provides a magnified, well-lit view of the front and back structures of the eye. A dilated eye exam allows them to look through the pupil and check for vitreous or retinal bleeding.
When deeper bleeding is suspected, additional imaging helps pinpoint the source. Optical coherence tomography (OCT) creates detailed cross-sectional images of the retina. If the blood is dense enough to block the doctor’s view of the retina, an ultrasound of the eye can reveal what’s happening behind the hemorrhage. These tools help determine both the severity and the underlying cause, which guides treatment decisions.
Treatment Options by Type
Subconjunctival hemorrhages don’t need treatment. The blood reabsorbs naturally over 1 to 3 weeks. Artificial tears can help if the eye feels mildly irritated, but no medication speeds up the healing process.
Hyphemas are managed more carefully. Treatment focuses on preventing rebleeding and controlling eye pressure. You may be told to rest with your head elevated, limit physical activity, and avoid blood-thinning medications temporarily. An eye shield is sometimes used for protection. Most small hyphemas resolve with conservative care, but larger ones may need surgical drainage if pressure inside the eye rises to dangerous levels.
Vitreous hemorrhages often start with a period of observation. Keeping your head elevated, especially during sleep, encourages the blood to settle to the bottom of the eye and away from the central line of vision. For mild cases with no other complications, this approach alone can be enough, with the blood gradually clearing over weeks to months. When the hemorrhage doesn’t resolve on its own, or when there’s an associated retinal detachment, a surgical procedure called a vitrectomy removes the blood-filled gel from the eye and replaces it with a clear solution.
For hemorrhages caused by diabetic eye disease or retinal vein blockages, laser treatment plays a central role. Targeted laser energy is applied to areas of the retina that aren’t receiving enough blood flow. This reduces the signals that trigger abnormal blood vessel growth and cuts the risk of future bleeding by about 50% in some cases. Laser treatment doesn’t reverse existing damage, but it stabilizes the condition and helps prevent it from worsening.
Recovery and What to Expect
Recovery time varies dramatically depending on the type and severity of the hemorrhage. A surface-level subconjunctival hemorrhage follows a predictable course: the bright red patch gradually shifts to orange, then yellow, then disappears entirely within about 2 weeks. The eye looks worse before it looks better, which can be unsettling, but the color change is a normal sign of healing.
Internal hemorrhages take longer. A mild vitreous hemorrhage may clear within a few weeks, while a dense one can take several months. If surgery is needed, visual recovery depends on whether the retina was damaged by the underlying cause of the bleeding. Some people regain full vision, while others have lasting changes.
Reducing Your Risk
Preventing surface-level eye hemorrhages isn’t always possible since they can happen spontaneously. But you can reduce the likelihood of more serious internal bleeding with a few practical steps. Keeping blood pressure and blood sugar well controlled protects the small blood vessels throughout the eye. For people with diabetes, 90% of diabetes-related blindness is preventable through consistent management of blood sugar, blood pressure, and cholesterol.
Protective eyewear makes a significant difference for trauma-related hemorrhages. Safety glasses, goggles, or sport-specific eye guards should be worn during any activity that puts your eyes at risk, whether that’s construction work, racquet sports, or yard work with power tools. If you take blood-thinning medications and notice frequent subconjunctival hemorrhages, it’s worth mentioning to your doctor, not to stop the medication, but to ensure your dosing and clotting levels are appropriate.