Retinal hemorrhages can take anywhere from about one week to several months to heal, depending on where in the retina the bleeding occurs, how large it is, and what caused it in the first place. A small, shallow bleed within the retinal layers themselves often clears in roughly ten days, while a deeper or more extensive hemorrhage trapped beneath or in front of the retina can linger for weeks or even three to four months. The timeline also shifts dramatically depending on whether the bleed is caused by trauma, a vein blockage, high altitude exposure, or an underlying disease like diabetes, and whether any treatment is used to speed things along.
Why the Timeline Varies So Much
The retina is layered like a stack of tissue paper, and where blood pools within that stack largely determines how quickly it clears. Intraretinal hemorrhages, the most common type, sit within the retinal tissue itself and tend to resolve the fastest. In a study tracking retinal hemorrhages in children with brain injuries, intraretinal hemorrhages had a median resolution time of about 10 days, while preretinal hemorrhages, which collect in the space just in front of the retina, took a median of around 38 days to clear.1BMJ Open Ophthalmology. Resolution patterns and duration of retinal haemorrhages measured by two-dimensional retinal area pixel counts from sequential retinal imaging in childhood encephalopathies: a morphometric study Hemorrhages deeper in the retina, particularly those in the Henle fiber layer near the macula, can take about three months to resolve on their own.2PubMed. Henle fibre layer haemorrhage: clinical features and pathogenesis
The body clears retinal blood through a cleanup process involving specialized immune cells. After a retinal injury, both resident immune cells called microglia and macrophages recruited from the bloodstream converge on the damaged area. The microglia, normally scattered throughout the retina in a resting state, activate and take on the characteristics of macrophages specifically in the injured zone. Together, these two cell populations engulf and digest dead photoreceptors and blood debris.3PubMed Central. Cooperative phagocytes: resident microglia and bone marrow immigrants remove dead photoreceptors in retinal lesions The speed of this cleanup depends on the volume of blood, the accessibility of the site, and whether the underlying cause is still actively contributing new bleeding.
Hemorrhages from Retinal Vein Occlusions
When a retinal vein becomes blocked, either at its central trunk or at a branch, the backup of blood pressure causes widespread hemorrhaging across the retina. These are among the most visually dramatic retinal bleeds, and they tend to take longer to clear than hemorrhages from most other causes. In central retinal vein occlusion, hemorrhages near the optic disc clear fastest, while those in the peripheral retina take the longest. Importantly, ischemic cases, where the blockage cuts off enough blood supply to starve retinal tissue, take significantly longer to resolve than non-ischemic ones at most retinal locations.4PubMed Central. Fundus Changes in Central Retinal Vein Occlusion
Branch vein occlusions follow a similar geographic pattern. Hemorrhages near the optic disc margin clear first, while peripheral hemorrhages linger. In major branch occlusions compared with smaller macular branch occlusions, hemorrhages in the fovea, the very center of the macula responsible for sharp vision, took significantly longer to resolve.5PubMed Central. Fundus Changes in Branch Retinal Vein Occlusion Because vein occlusions involve persistent vascular damage, recovery timelines measured in months are typical, and recurrent bleeding is a real possibility if the underlying vascular issue is not addressed.
Trauma and Pediatric Head Injuries
Retinal hemorrhages caused by head trauma, including those seen in cases of abusive head injury in children, follow a surprisingly predictable pattern. In a study of 91 eyes in 52 children with head trauma, intraretinal hemorrhages nearly always resolved to either none or mild within one to two weeks. Even eyes with hemorrhages initially described as “too numerous to count” cleared within a few days. The longest any isolated intraretinal hemorrhage persisted was 32 days. Preretinal hemorrhages, however, were more stubborn, persisting anywhere from 5 to 111 days.6Journal of American Association for Pediatric Ophthalmology and Strabismus. The natural history of retinal hemorrhage in pediatric head trauma
This distinction matters for forensic and clinical purposes. Doctors evaluating a child for suspected abuse use the pattern of hemorrhage resolution as one piece of evidence in estimating when an injury occurred. The rapid clearance of intraretinal blood means that the presence of extensive intraretinal hemorrhages suggests a relatively recent injury, while lingering preretinal collections point to something that happened weeks earlier.
High Altitude Retinal Hemorrhages
Climbers and trekkers ascending above about 4,000 meters can develop retinal hemorrhages from the sudden drop in oxygen pressure and the resulting dilation and leakage of retinal blood vessels. In most cases, these bleeds cause no symptoms or only mild visual disturbance, and the person may not even realize they have them.7Travel Medicine and Infectious Disease. High altitude retinopathy: An overview and new insights One study found that after participants returned to lower elevation, no lasting changes were detectable on fluorescein angiography or visual field testing, and the only visual symptom reported during the expedition was floaters in a single participant whose bleeding had been extensive enough to reach the vitreous cavity.8PLOS ONE. Delayed Appearance of High Altitude Retinal Hemorrhages
The expected recovery period after returning to normal altitude is roughly three months. Research suggests that restoration of normal atmospheric oxygen content allows retinal nerve and vascular function to return to baseline within that time frame.9PubMed Central. High-altitude retinopathy and retinal hemorrhage: A case report Severe or permanent vision loss from high altitude retinopathy is rare, but it does occur in extreme cases. For most people, descending is the treatment, and patience covers the rest.
Valsalva Retinopathy
Straining hard, whether from heavy lifting, violent vomiting, or intense coughing, can spike venous pressure enough to burst a small retinal vessel. This produces a distinctive pocket of blood, often trapped just in front of the macula beneath the internal limiting membrane. The visual effect can be alarming: a sudden dark blob in central vision. Left untreated, this type of hemorrhage can take weeks to months to clear on its own because the blood is somewhat sequestered in a space with limited drainage.
Laser treatment has changed the outlook for these cases considerably. A study of patients with premacular subhyaloid hemorrhage from Valsalva retinopathy found that after Nd:YAG laser treatment, which creates a small opening in the membrane to allow blood to disperse, 14 of 16 eyes improved to 20/20 vision within the first week. The remaining two reached that level within a month.10PubMed. Long-term results of Nd:YAG laser treatment for premacular subhyaloid haemorrhage owing to Valsalva retinopathy Without treatment, the same hemorrhage might take two to three months to resolve, with prolonged visual loss in the interim.
Terson Syndrome
Terson syndrome occurs when a sudden brain hemorrhage, most commonly from a ruptured aneurysm, causes a secondary hemorrhage inside the eye. The blood can collect in the vitreous cavity, the preretinal space, or both, and because the patient is typically dealing with a life-threatening neurological emergency, the eye bleeds may not receive immediate attention. In a review of cases at a tertiary center, about 40% of affected eyes saw spontaneous resolution of the hemorrhage within two months.11PubMed Central. Terson Syndrome – Clinical Presentation, Management, and Visual Outcomes in a Tertiary Centre The remaining 60% eventually required surgical removal of the blood through vitrectomy.
In milder cases, spontaneous clearing can happen over roughly three months with good visual recovery afterward.12International Journal of Surgery Case Reports. Terson syndrome: Two case reports The practical question for patients and families recovering from a brain hemorrhage is whether to wait or operate. Most ophthalmologists give the eye a window of one to three months for spontaneous clearing before recommending surgery, balancing the desire for visual recovery against the patient’s overall neurological status and readiness for another procedure.
The Urgency of Submacular Hemorrhage
Not all retinal hemorrhages allow for a wait-and-see approach. When blood collects directly beneath the macula, sitting between the retinal pigment epithelium and the photoreceptors, the clock is ticking. Photoreceptor damage from submacular blood has been reported within 24 hours. Three separate mechanisms cause the harm: iron released from breaking-down hemoglobin is directly toxic to the delicate photoreceptor cells, the clot blocks the normal diffusion of oxygen and nutrients from the underlying choroid, and as the clot contracts it physically shears the photoreceptors.13PubMed Central. Traumatic submacular hemorrhage: available treatment options and synthesis of the literature
This triple threat means that submacular hemorrhage is treated as a relative emergency. While the blood itself may eventually clear over weeks to months, the damage it inflicts while sitting there can be irreversible. In cases of traumatic maculopathy with massive submacular hemorrhage, even after the blood resolves, many eyes end up with dense macular scars or foveal atrophy, with visual acuity stuck at very low levels.14Ophthalmology Retina. Traumatic Maculopathy with Massive Subretinal Hemorrhage after Closed-Globe Injuries: Associated Findings, Management, and Visual Outcomes The lesson here: “the hemorrhage healed” and “vision recovered” are not the same sentence.
How Blood Thinners Affect the Picture
People taking anticoagulants or antiplatelet medications often worry that their blood thinners will worsen retinal bleeding or slow healing. The evidence is more nuanced than a simple yes or no. In the large Comparison of Age-Related Macular Degeneration Treatments Trials, the overall presence and size of retinal or subretinal hemorrhage was not significantly associated with antiplatelet or anticoagulant use. However, among the subset of patients with hypertension, blood thinner use was associated with a higher rate of hemorrhage at baseline.15Ophthalmology. Association between Antiplatelet or Anticoagulant Drugs and Retinal or Subretinal Hemorrhage in the Comparison of Age-Related Macular Degeneration Treatments Trials
Where blood thinners do seem to matter is in the severity of bleeding when it happens. A separate study of patients with submacular hemorrhage caused by wet age-related macular degeneration found that those on blood-thinning medication had significantly larger hemorrhages, averaging about 36 square millimeters compared with roughly 22 square millimeters in patients not on these drugs. Patients on traditional vitamin K antagonists fared worse than those on newer direct oral anticoagulants in terms of both hemorrhage size and visual outcomes after treatment.16PubMed Central. Antiplatelet and anticoagulant therapy in patients with submacular hemorrhage caused by neovascular age-related macular degeneration Bigger hemorrhages generally take longer to clear and cause more photoreceptor damage, so while blood thinners may not directly slow the biological cleanup, they can set the stage for a worse starting point.
Treatments That Can Speed Up Recovery
Several interventions exist to hasten hemorrhage clearance or limit the damage blood causes while it sits on delicate retinal tissue. The choice depends on the type and location of the hemorrhage, its cause, and how urgently vision needs to be restored.
- Anti-VEGF injections: These drugs, injected directly into the eye, were developed primarily to treat abnormal blood vessel growth but also help manage hemorrhage-related edema and reduce retinal thickness. In traumatic submacular hemorrhage, patients who received anti-VEGF injections showed a significant improvement in visual acuity, gaining an average of about four lines on an eye chart, compared with controls whose improvement was not statistically significant.17PubMed. Efficacy of anti-VEGF intravitreal injection in traumatic submacular hemorrhage: a retrospective study
- Laser photocoagulation: Retinal laser is used both to seal leaking vessels and to puncture membranes trapping blood. In hemorrhagic retinal arterial microaneurysms, laser treatment, anti-VEGF injections, and combination therapy all produced significant reductions in macular thickness.18PubMed Central. Retinal laser photocoagulation and intravitreal injection of anti-VEGF for hemorrhagic retinal arterial microaneurysm For Valsalva retinopathy, as noted above, laser can shorten recovery from months to days.
- Combination therapy: In conditions like diabetic macular edema and retinal vein occlusion, combining anti-VEGF injections with laser treatment can shorten hemorrhage absorption time. One study found that adding an anti-VEGF agent to laser treatment shortened the time to fundus hemorrhage absorption from roughly three weeks to about two and a half weeks.19PubMed Central. Effect of Adjuvant Conbercept on Patients with Macular Edema Induced by Diabetic Retinopathy and Retinal Vein Occlusion Undergoing Laser Treatment: Impact on Symptom Improvement
- Vitrectomy: When blood fills the vitreous cavity and does not clear on its own, surgical removal becomes the standard approach. Doctors typically allow one to three weeks for spontaneous improvement before recommending surgery, though this window shortens if an associated retinal tear or detachment is detected.20PubMed Central. Early vitrectomy for dense vitreous hemorrhage in adults with non-traumatic and non-diabetic retinopathy Vitrectomy is also used in Terson syndrome and in non-clearing vitreous hemorrhage from diabetic retinopathy when watching and waiting has not produced results.21Ophthalmology Retina. Outcomes and Complications of Pars Plana Vitrectomy for Nonclearing Vitreous Hemorrhage Without Tractional Elements
When Healing Does Not Mean Full Recovery
A retinal hemorrhage can clear completely and still leave permanent damage behind. This is especially true when blood has sat beneath the macula for any significant period. The same iron toxicity, nutrient blockade, and mechanical shearing described earlier can destroy photoreceptors before the blood is reabsorbed, leaving a scar or zone of atrophy in the most vision-critical part of the retina. In a study of closed-globe eye injuries with massive submacular hemorrhage, 13 eyes ended up with visual acuity of 2/200 or worse, with imaging showing dense macular scars, pigment clumping, and loss of the photoreceptor layers that are visible on detailed retinal scans.14Ophthalmology Retina. Traumatic Maculopathy with Massive Subretinal Hemorrhage after Closed-Globe Injuries: Associated Findings, Management, and Visual Outcomes
Even hemorrhages that initially seem benign can occasionally leave a trace. After a large preretinal bleed clears, some patients notice a faint residual membrane or mild distortion that persists. And in vein occlusions, the hemorrhage is often the visible symptom of deeper damage to the retinal vasculature that goes on to cause chronic macular edema, new abnormal vessel growth, or permanent ischemic injury to the retinal nerve fiber layer.
Monitoring Hemorrhage Resolution
If you have been diagnosed with a retinal hemorrhage, your ophthalmologist will schedule follow-up imaging to track how the blood is clearing. Optical coherence tomography, which generates cross-sectional images of the retina in real time, has become the primary tool for this. It can show the precise layer where blood has accumulated, measure how much retinal swelling remains, and detect early signs of photoreceptor damage or scar formation even before visual symptoms change. Color fundus photography provides a complementary top-down view of the hemorrhage’s footprint, making it easy to compare images visit to visit.
The expected follow-up schedule depends on the cause and severity. Small intraretinal hemorrhages from mild trauma or transient episodes might need just one or two follow-up checks a few weeks apart. Vein occlusions typically require monthly visits for at least several months, partly to monitor hemorrhage resolution but also to watch for complications like macular edema or new vessel growth that can develop as the acute bleeding subsides. Submacular hemorrhages warrant especially close surveillance in the early days, given the rapid onset of photoreceptor damage already described.
For anyone navigating a retinal hemorrhage, the honest answer to “how long will this take?” is that it depends on factors no single timeline can capture, from the anatomy of where the blood settled, to the underlying cause, to how quickly treatment begins. A superficial bleed from straining too hard during exercise can vanish in a week or two. A deep hemorrhage beneath the macula from a vein occlusion or trauma can take months and may leave permanent visual changes even after the blood is gone. The interval between those two extremes is where most patients land, and it is why close follow-up matters more than any rule of thumb.