Vitreous Hemorrhage That Won’t Clear: How Long Do You Wait Before Vitrectomy?
Blood in Your Eye That Is Not Clearing: Start Here
Most blood in the eye is watched, not rushed to surgery. A few signs change that. Call your eye doctor the same day if you notice any of these:
- A curtain or shadow sliding across your side vision
- A sudden drop in vision in that eye
- Severe eye pain, or a red eye with halos around lights
- A big new shower of floaters or flashing lights
Here is why speed matters. Blood can hide a retinal tear or a detached retina. So your eye gets repeat ultrasound scans1. When a detachment lifts the center of the retina, eyes repaired within about three days ended up seeing a bit better than eyes repaired four to seven days later2. A scan takes minutes. Ask for one. Do not wait out a new symptom at home.
For a first bleed with no detachment, waiting weeks to a few months is normal. Eye clinics often move toward surgery at about one month for type 1 diabetes, at two to three months for type 2 diabetes, and sooner for a detached retina or new vessels on the iris3. Your own date depends on what the scans show and how well the other eye sees. Nobody is putting a stopwatch on you, and nobody should leave you drifting either.
Waiting is an active plan, not a shrug. You come back on a set schedule so somebody looks at the retina behind the blood. The American Academy of Ophthalmology says an eye with a vitreous hemorrhage should be followed with repeat ultrasound scans, watching for a retinal tear, for traction pulling on the macula, or for a detachment1. Your job between visits is small but real: keep the appointments, and report a change rather than waiting for the next one.
What a Vitreous Hemorrhage Is and Why Yours Is Slow to Clear
The vitreous is the clear gel that fills the back of your eye. A vitreous hemorrhage is blood that has leaked into that gel. In advanced diabetic eye disease, fragile new vessels grow on the retina and bleed into the gel, so people see dark floating spots or streaks like cobwebs4. Diabetes is behind roughly 31 to 54 of every 100 vitreous hemorrhages in adults, with a retinal tear and injury the other common sources3. Your retina doctor confirms which one you have.
The gel has no blood vessels of its own to carry blood away. Clearing happens slowly, cell by cell, at the edges. Roughly one hundredth of the blood clears each day, and it goes slower still in a younger eye where the gel is firm3. That is the honest reason your view stays murky for weeks, and why a bleed that is thinning on schedule is worth waiting on.
Nonclearing is a practical label, not a lab value. It means enough blood is still in the way that your vision has not come back, or that your doctor still cannot see and treat the retina. Academy guidance lists nonclearing vitreous hemorrhage as a typical reason to consider vitrectomy, along with cloudiness that blocks vision or treatment5. The label covers what you can see out, and what your surgeon can see in.
How Your Retina Doctor Watches an Eye Full of Blood
Cameras need a clear path. Blood blocks that path, so the usual retina photo comes back useless. Ultrasound reads through blood. It shows the state of the retina behind a hemorrhage, measures how much blood is there, maps the pull of scar tissue, and can find a detachment when the view is blocked1. The probe rests on your closed eyelid over gel. It does not hurt and takes minutes.
Often enough to catch trouble early. A clinical review from the American Academy of Ophthalmology advises that a patient under observation be seen every two or three weeks for a B-scan ultrasound, to rule out a retinal break or a detachment3. If your clinic spaces visits differently, ask why. Put the next appointment in your phone before you leave the building.
Three findings usually move the plan. A detachment, or traction dragging on the macula. New vessels growing on the iris. Or blood that is not thinning while the retina still needs laser. Practice guidance names traction detachment involving or threatening the macula, combined traction and tear-related detachment, and dense blood trapped in front of the macula as typical surgical reasons5, and a clinical review puts a detached retina or new vessels on the iris in the urgent column3. None of these is a personal failure. Each one has a next step.
What Vitrectomy Is and How the Operation Works
Vitrectomy takes the cloudy gel out of your eye. The surgeon removes some or all of the vitreous through tiny openings and replaces it with saline, a gas bubble, or silicone oil. It is done in an outpatient surgery center under local or general anesthesia, over one to several hours6. Outpatient means you go home the same day in most cases, with someone else driving. What goes back in shapes your recovery, so ask which filler your surgeon expects to use.
Removing blood does not switch off the disease that caused it. Once the gel is out, the surgeon can see the whole retina, so laser is often finished right then. In the trial comparing the two paths, the surgical group had vitrectomy together with panretinal photocoagulation, the scatter laser used to treat advanced diabetic retinopathy7. That is much of the value: the view comes back and the cause gets treated the same day.
Some surgeons give an anti-VEGF injection in the days before surgery to quiet the new vessels. Academy guidance reports that one review found injections before surgery shortened operating time, reduced retinal breaks, and cut bleeding during the operation. A second review suggested they may lower the rate of bleeding afterward8. Whether you get one is a surgical judgment call, so ask what your surgeon plans.
Who Should Have Vitrectomy Sooner Rather Than Later
Timing follows the eye, not the calendar. Vitrectomy is generally held for eyes where disease is still active despite injections or laser, or where medicine alone cannot manage it5. Guidance also notes that the value of early surgery rises as the growth of abnormal vessels gets worse5. Traction near the macula means a shorter leash. A quiet retina under thinning blood means a longer one.
This comes from the landmark trial. It randomly assigned 616 eyes with severe diabetic vitreous hemorrhage to early vitrectomy or to waiting a year. After two years, 25 of every 100 early-surgery eyes saw 20/40 or better, against 15 of every 100 that waited. Among people with type 1 diabetes the gap was wider, 36 of every 100 against 12 of every 1009. No such gap appeared in type 2 diabetes, where the groups landed at 16 and 18 of every 1009. That trial ran before modern injections, so treat it as one strong input, not the last word.
Waiting makes sense when the retina looks stable on ultrasound, the blood is thinning, and your other eye lets you function. One hospital review of 178 eyes found that those operated within about six weeks averaged roughly 20/50 at a year, while those operated much later averaged roughly 20/95, with fewer serious complications in the earlier group10. That study looked backward at records, so it shows a link rather than a cause. It is still fair to ask whether your wait is drifting.
Injections or Surgery First: What the Head-to-Head Trial Showed
One randomized trial has compared these choices directly. It enrolled 205 eyes with vitreous hemorrhage from advanced diabetic retinopathy, at a median starting vision of 20/200. Averaged over the first 24 weeks, vision was 20/63 with injections and 20/63 with surgery, and that difference was not statistically significant. At 4 weeks the surgical group was ahead, about 20/63 against about 20/100. By two years both groups averaged about 20/407. The table repeats those same figures.
| What was measured | Injections first | Surgery first |
|---|---|---|
| Average vision over 24 weeks | About 20/63 | About 20/63 |
| Average vision at 4 weeks | About 20/100 | About 20/63 |
| Average vision at 2 years | About 20/40 | About 20/40 |
Speed is where the two paths part. In the same trial, the middle time for the blood to clear was 36 weeks with injections and 4 weeks with surgery. Bleeding came back within two years in 53 of every 100 injection eyes and 17 of every 100 surgery eyes. Abnormal new vessels settled at a middle time of 12 weeks against 4 weeks11. Both roads reached a similar place. Surgery got there faster.
If you need vision back for work or for caring for someone, faster clearing matters. If you would rather avoid an operating room, and your scans are calm, injections are a reasonable first move. Academy guidance treats anti-VEGF injections and vitrectomy as reasonable first options for an eye with lasting vitreous hemorrhage alone5. Say which trade-off you care about most.
What to Settle Before You Agree to Surgery
You get a full exam, an ultrasound, and a look at the other eye. Ask what your surgeon expects to find behind the blood, and what changes if the retina turns out to be detached or scarred. Ask what will be left in the eye at the end, because that answer drives your recovery.
Surgery is not automatic. A surgeon may hold off when the blood is thinning on schedule, when the eye has had neither laser nor injections yet, or when a medical problem makes anesthesia risky this month. There is also a caution that runs the other way. Academy guidance notes that after an anti-VEGF injection, eyes with severe diabetic retinopathy can develop new traction, or existing traction can worsen, though one large trial found no significant difference in traction detachment rates between laser and anti-VEGF12. Being told to wait is a plan with a review date. Leave with that date.
Bring your recent A1c and your medication list, including blood thinners. Your surgeon and your diabetes team decide together what pauses and what continues, so do not stop anything on your own. The National Eye Institute says that keeping blood sugar in a healthy range, with blood pressure and cholesterol controlled, is the best way to lower the risk of vision loss from diabetic retinopathy4. That work protects the eye you are not operating on.
Recovery After Vitrectomy, Week by Week
A patch protects the eye for several days, medication is prescribed for healing and discomfort, and a scratchy feeling is common and temporary6. You rest until the anesthesia wears off and then go home, and eye drops are usually used for up to four weeks13. Expect the view to come back gradually rather than all at once. Plan for help at home the first day or two, and treat real pain as a reason to call.
If the surgeon leaves a gas bubble, your recovery changes shape. Academy patient guidance says a gas bubble means keeping your head face-down or turned to one side for as long as your doctor advises, from days to weeks. It also says not to fly, go to high altitude, or scuba dive until the bubble is gone, because altitude change can raise the pressure inside the eye14. Many people notice the bubble as a dark line that shrinks over the following weeks.
Most people are back to desk work within one to two weeks, though this varies a lot. Driving waits until your vision meets the legal standard where you live and your surgeon agrees. Heavy lifting and swimming wait for a specific clearance. If you have to position face-down, arrange meals and help beforehand.
Risks and a Realistic Picture of Your Vision Afterward
The Academy lists the possible complications of vitrectomy as further vitreous bleeding, a retinal tear or detachment, vision loss, infection inside the eye, cataract, and a tear of the lens capsule15. Infection is the rarest and the most feared. Across 111,876 vitrectomies at one large eye hospital, confirmed infection inside the eye followed about 2 of every 10,000 operations, and about 0.5 of every 10,000 with the small-gauge instruments used today16. Rare is not never, which is why worsening pain after surgery is a same-day call.
If you still have your own lens, expect the cataract question to come up. Academy guidance lists cataract among the possible complications of vitrectomy15. In that head-to-head trial, among eyes that still had a natural lens, cataract surgery was done within two years in about 28 of every 100 surgical eyes and about 31 of every 100 injection eyes, a gap that was not statistically significant11. So plan for the possibility without treating it as a certainty. Cataract surgery afterward is routine, and many people see better after it.
Clearing the blood restores the view. It cannot undo damage the retina already took, and no one can promise you a number. In that trial, average vision two years on was about 20/40 in both groups, starting from a median of 20/2007. Averages hide a wide spread. What the retina looks like once the blood is out drives your own result, and your surgeon can narrow the range for you at that point.
When to Call Your Eye Doctor
Call your surgeon right away, on the same day, if you have growing eye pain, growing redness, discharge, or vision that is getting worse instead of better. Infection inside the eye and a retinal tear or detachment are both listed complications of vitrectomy15, which is why a worsening eye after surgery is a same-day call rather than a wait-and-see. Most such calls turn out to be normal healing. The one that is not needs seeing fast.
Before surgery, the change to report is new loss of side vision, or a sudden worsening rather than the slow clearing you were told to expect. The reason for repeat scans while you wait is exactly this: to catch a retinal tear, traction on the macula, or a detachment hiding behind the blood1. You are not being a nuisance by calling between visits. That part of the plan is yours alone.
An eye with a nonclearing hemorrhage belongs with a retina specialist, the doctor who reads the scans and does the operation. Your optometrist or general ophthalmologist can start the referral. If your practice cannot fit you in when something changes, say the words retinal detachment on the phone and ask for an urgent slot.
Questions People Ask While Waiting for Vitrectomy
It might, and many do. Blood leaves the vitreous slowly, roughly one hundredth of it a day, and slower in a younger eye with firm gel3. That is why doctors give it weeks before calling it nonclearing. The catch is that clearing on its own does nothing about the diabetic disease that caused the bleed. Even if the view returns, you still need laser or injections so the same vessels do not bleed again.
Waiting with monitoring is different from waiting alone. The point of repeat ultrasound during observation is to catch a retinal tear, traction pulling on the macula, or a detachment the blood is hiding1. The risk of waiting is that one of those develops unwatched. Kept appointments turn the wait into a plan. Missed ones turn it into a gamble on an eye nobody is watching.
It may shift your timing earlier. In the randomized trial of 616 eyes, people with type 1 diabetes did better with early surgery than with waiting a year, 36 of every 100 against 12 of every 100 reaching 20/40 at two years, while the type 2 groups landed close together at 16 and 18 of every 1009. That trial predates today's injections, so it informs your date rather than fixing it.
Sometimes, yes. Academy guidance calls anti-VEGF injections and vitrectomy both reasonable first treatments for an eye with lasting vitreous hemorrhage alone5. In the head-to-head trial, roughly a third of the injection group went on to have vitrectomy anyway during follow-up11. So injections are a real option, and also a decision you may revisit. Ask what would make your team switch course.
No one can give you a personal number, and you should be wary of anyone who does. In that trial, eyes starting at a median of 20/200 averaged about 20/40 two years later in both groups7. An average is not a promise. Your result depends on what the retina looks like once the blood is out, above all whether the macula has been detached or scarred. Your surgeon can narrow the range after the operation.
Because the scan answers the question surgery would answer, without the operating room. Ultrasound shows the state of the retina behind a hemorrhage, measures the amount of blood, maps traction from scar tissue, and finds a detachment when the view is blocked1. If the scans stay clean and the blood is thinning, surgery buys you little for its risk. When a scan changes, so does the plan, usually quickly.
Questions About the Operation and What Comes After
Usually yes, in a light way. Vitrectomy is typically done in an outpatient surgery center under local or general anesthesia, and takes one to several hours6. With local anesthesia the eye itself is numbed, and most people describe lights and movement rather than anything sharp. Ask which type is planned, since it changes how you eat and take medicines that morning.
Not until any gas bubble is gone. Academy patient guidance says not to fly, go to high altitude, or scuba dive while a gas bubble is in the eye, because the pressure change can raise the pressure inside the eye14. Your surgeon confirms at a visit when the bubble has gone, which takes days to weeks depending on the gas used. If travel is booked, say so before surgery.
Yes, and it is worth knowing the odds. Over two years in the head-to-head trial, bleeding came back in 17 of every 100 eyes treated with vitrectomy and in 53 of every 100 treated with injections11. A small rebleed after surgery often clears on its own now that the gel is gone. Report it rather than waiting, since your team will want to check that the retina underneath is still flat.
Quite possibly, if you still have your own lens. Among eyes with a natural lens in that trial, cataract surgery happened within two years in about 28 of every 100 after vitrectomy and about 31 of every 100 after injections11. It is a second, shorter, routine operation, and many people find their vision improves again once the cloudy lens is replaced.
- What does my ultrasound show today, and has it changed since the last one?
- Is my retina flat, and is anything pulling on the macula?
- What date or finding would move me from waiting to surgery?
- Would you start with injections or with vitrectomy in my case, and why?
- Has this eye had laser treatment yet, and does it need more?
- Will you put a gas bubble in, and how long would I have to position?
- Do I still have my own lens, and how likely is cataract surgery later?
- Which symptoms should make me call the same day, and what number do I use after hours?
- American Academy of Ophthalmology, Preferred Practice Pattern, Retina/Vitreous Committee (Lim JI et al.), published in Ophthalmology (2025). Diabetic Retinopathy Preferred Practice Pattern (Ultrasonography; serial ultrasound follow-up of vitreous hemorrhage).
- Sothivannan A et al., American Journal of Ophthalmology (meta-analysis of 20 observational studies, 1,929 patients) (2022). Impact of the Time to Surgery on Visual Outcomes for Rhegmatogenous Retinal Detachment Repair: A Meta-Analysis.
- American Academy of Ophthalmology, EyeNet Magazine clinical review (2020). Vitreous Hemorrhage: Diagnosis and Treatment.
- National Eye Institute, National Institutes of Health (2024). Diabetic Retinopathy.
- American Academy of Ophthalmology, Preferred Practice Pattern, Retina/Vitreous Committee (Lim JI et al.), published in Ophthalmology (2025). Diabetic Retinopathy Preferred Practice Pattern (Other Treatments: typical indications for vitrectomy).
- American Academy of Ophthalmology, EyeSmart patient education (2024). What Is Vitrectomy?.
- Antoszyk AN et al., DRCR Retina Network Protocol AB, JAMA (multicenter randomized trial, 205 eyes) (2020). Effect of Intravitreous Aflibercept vs Vitrectomy With Panretinal Photocoagulation on Visual Acuity in Patients With Vitreous Hemorrhage From Proliferative Diabetic Retinopathy: A Randomized Clinical Trial.
- American Academy of Ophthalmology, Preferred Practice Pattern, Retina/Vitreous Committee (Lim JI et al.), published in Ophthalmology (2025). Diabetic Retinopathy Preferred Practice Pattern (preoperative anti-VEGF before vitrectomy; rated I+, Moderate quality, Strong recommendation).
- The Diabetic Retinopathy Vitrectomy Study Research Group, Archives of Ophthalmology (multicenter randomized trial, 616 eyes) (1985). Early vitrectomy for severe vitreous hemorrhage in diabetic retinopathy. Two-year results of a randomized trial. Diabetic Retinopathy Vitrectomy Study report 2.
- Anguita R et al., American Journal of Ophthalmology (retrospective comparative study, 178 eyes, Moorfields Eye Hospital) (2025). Early Versus Delayed Vitrectomy for Vitreous Hemorrhage Secondary to Proliferative Diabetic Retinopathy.
- Antoszyk AN et al., DRCR Retina Network Protocol AB secondary analysis, JAMA Ophthalmology (2021). Visual Acuity, Vitreous Hemorrhage, and Other Ocular Outcomes After Vitrectomy vs Aflibercept for Vitreous Hemorrhage Due to Diabetic Retinopathy: A Secondary Analysis of a Randomized Clinical Trial.
- American Academy of Ophthalmology, Preferred Practice Pattern, Retina/Vitreous Committee (Lim JI et al.), published in Ophthalmology (2025). Diabetic Retinopathy Preferred Practice Pattern (traction after anti-VEGF injection in severe proliferative disease).
- American Academy of Ophthalmology, EyeSmart patient education (2024). What Happens During a Vitrectomy?.
- American Academy of Ophthalmology, EyeSmart patient education (2024). Positioning After Retinal Surgery.
- American Academy of Ophthalmology, Preferred Practice Pattern, Retina/Vitreous Committee (Lim JI et al.), published in Ophthalmology (2025). Diabetic Retinopathy Preferred Practice Pattern (potential complications of vitrectomy and of intravitreal injection).
- Dave VP et al., PLOS ONE (retrospective series of 111,876 consecutive vitrectomies) (2018). Incidence, microbiology, and outcomes of endophthalmitis after 111,876 pars plana vitrectomies at a single, tertiary eye care hospital.