Vitreous Hemorrhage: What Patients Need to Know

Vitreous hemorrhage is bleeding into the vitreous, the clear gel that fills the center of the eye. It can cause sudden floaters, cloudy vision, or shadowing, and it should be assessed promptly because the bleeding may signal an underlying eye problem that needs treatment.

Overview

Vitreous hemorrhage is bleeding into the vitreous, the clear gel-like substance that fills the space between the lens and the retina. When blood enters this normally transparent area, light cannot pass through the eye as clearly, so vision may become blurred, hazy, shadowed, or filled with floaters. The amount of vision change varies. A small hemorrhage may cause only a few spots or strands, while a larger one can significantly reduce sight.

For many patients, the most important point is that vitreous hemorrhage is a sign rather than a diagnosis by itself. The bleeding often comes from fragile or damaged blood vessels in the retina, a retinal tear, or an eye injury. Because some of these causes require urgent care, sudden changes in vision should not be ignored even if there is no pain.

Vitreous hemorrhage can affect one or both eyes, but it usually occurs in one eye at a time. It may happen suddenly or develop over a short period. In some cases, the blood slowly clears on its own, but full recovery depends on treating the underlying condition and protecting the retina from further damage.

What symptoms can it cause?

The symptoms of vitreous hemorrhage often begin suddenly. Many people notice new floaters that may look like dots, cobwebs, threads, smoke, or drifting dark spots. Others describe a reddish tint, cloudiness, or a general dimming of vision. If the amount of bleeding is larger, vision may drop substantially, sometimes to the level of only seeing hand movements or light.

Vitreous hemorrhage is usually painless. That can make it tempting to wait and see if it improves, but painless vision changes still need medical assessment. The absence of pain does not mean the cause is minor.

Symptoms can include:

• Sudden onset of floaters
• Blurred or hazy vision
• Shadows, streaks, or cobweb-like shapes in the visual field
• Reduced ability to see clearly, especially in one eye
• A dark curtain or marked loss of vision if a retinal problem is also present

If flashes of light, a curtain-like shadow, or rapidly worsening sight occurs, an urgent retinal problem such as a tear or detachment may be present alongside the bleeding.

Why does vitreous hemorrhage happen?

The most common causes involve abnormal, fragile, or torn blood vessels in the back of the eye. A frequent reason is diabetic retinopathy, especially advanced disease in which new fragile blood vessels grow and bleed easily. Another major cause is a retinal tear, which can happen when the vitreous pulls on the retina as it changes with age.

Eye trauma is another important cause. A direct blow to the eye or head can damage retinal vessels and lead to bleeding into the vitreous. Less commonly, inflammation, retinal vein occlusion, age-related changes in the vitreous, blood vessel abnormalities, or certain eye surgeries may be involved.

Risk factors depend on the underlying cause, but may include:

• Diabetes, especially when blood sugar has been difficult to control
• A history of diabetic eye disease such as diabetic retinopathy
• Previous retinal tears or detachment
• Eye injury or recent ocular surgery
• High myopia (strong nearsightedness)
• Older age, when the vitreous naturally changes and may pull away from the retina
• Blood-thinning medication, which may worsen bleeding though it is not usually the root cause

Sometimes the hemorrhage is the first sign of an eye condition that had not yet been diagnosed. That is one reason an eye examination is so important, even if the symptoms seem to improve.

How doctors diagnose it

Diagnosis begins with a careful description of symptoms and a full eye examination. The eye specialist will usually check visual acuity, examine the pupil responses, measure eye pressure, and dilate the pupil to look at the retina and vitreous. This helps confirm that blood is present and may identify the source of bleeding.

Sometimes the blood blocks the view of the retina. When that happens, imaging is often used to make sure there is not a hidden retinal tear or detachment. Ocular ultrasound is particularly helpful in this situation because it can provide information even when the inside of the eye cannot be seen clearly.

Further evaluation may be recommended depending on the suspected cause. For example, if diabetic eye disease is involved, retinal imaging or specialist assessment may be needed to guide treatment. If a tear, detachment, or advanced retinal disease is suspected, patients may be referred promptly for retinal care, including procedures such as retinal detachment surgery when appropriate.

The goal of diagnosis is not only to confirm vitreous hemorrhage but also to identify the underlying problem quickly. This is what determines whether observation is safe or whether urgent treatment is needed.

Treatment options and what recovery may look like

Treatment depends on the cause, the amount of bleeding, and whether the retina can be examined safely. In some cases, a small vitreous hemorrhage is monitored while the blood gradually settles and clears. During observation, follow-up visits are important to make sure no retinal tear or other hidden condition is missed.

When an underlying retinal disease is found, treatment is directed at that cause. For example, bleeding from diabetic retinopathy may be managed with retinal laser treatment, injections, or surgery. A retinal tear may need prompt sealing to reduce the risk of detachment. If the blood is dense, does not clear, or prevents treatment of the retina, surgery may be recommended.

A procedure called vitrectomy removes the blood-filled vitreous gel and allows the surgeon to treat retinal problems directly. In selected cases, doctors may also use laser treatment for retinal tears or diabetic retinal changes. When diabetic retinal disease is part of the picture, patients may need ongoing management similar to care for diabetic retinopathy treatment.

Recovery varies. Some people improve as the blood clears, while others need treatment before vision can recover. The final outcome depends largely on the health of the retina and how quickly the cause is addressed. Even when vision improves, continued monitoring may be needed to reduce the risk of repeat bleeding.

Self-care, prevention, and daily precautions

There is no single way to prevent every case of vitreous hemorrhage, but risk can often be reduced by protecting eye health and managing related medical conditions. Good diabetes care is especially important because it helps lower the risk of severe diabetic retinal disease. Regular eye exams are also essential for people with diabetes, high myopia, past retinal problems, or previous eye surgery.

Protective eyewear can reduce the chance of eye injuries during sports, home repairs, and certain jobs. Patients should also follow their doctor’s advice after eye procedures and report any sudden new floaters, flashes, or vision loss without delay.

General self-care steps may include:

• Attending routine eye checkups, especially if at higher risk
• Managing blood sugar, blood pressure, and overall vascular health
• Using protective eyewear during activities with injury risk
• Following treatment plans for known retinal disease
• Avoiding self-diagnosis when sudden floaters or blurred vision appear

After diagnosis, the care team may recommend temporary practical measures such as limiting strenuous activity or sleeping with the head elevated, depending on the situation. These steps do not replace treatment, but they may support monitoring while the eye is being evaluated.

When to seek medical care

Sudden floaters, blurred vision, or a smoky shadow in one eye should be assessed promptly by an eye doctor. While some causes are less urgent, these symptoms can also signal retinal tear, detachment, or active retinal bleeding that benefits from early treatment.

Emergency or same-day assessment is especially important if symptoms are accompanied by flashes of light, a curtain-like shadow, rapidly worsening vision, or recent eye trauma. People with diabetes should be particularly cautious, as vitreous hemorrhage may be related to advanced retinal disease.

If a patient has recurrent episodes, persistent vision loss, or difficulty obtaining a clear diagnosis, specialist retinal evaluation may be needed. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat vitreous hemorrhage and related retinal conditions for international patients.

Frequently asked questions

Is vitreous hemorrhage an emergency?

It can be urgent because the bleeding may be caused by a retinal tear, retinal detachment, or advanced diabetic eye disease. Sudden new floaters, blurred vision, flashes, or a curtain-like shadow should be assessed promptly by an eye specialist.

Can vitreous hemorrhage go away on its own?

Sometimes a small hemorrhage clears gradually as the body reabsorbs the blood. However, improvement in symptoms does not remove the need to identify the cause, because some underlying retinal problems still require treatment.

Does vitreous hemorrhage cause pain?

It is usually painless. Many patients notice visual changes without discomfort, which is why painless vision loss should still be taken seriously.

What is the most common cause of vitreous hemorrhage?

Common causes include diabetic retinopathy, retinal tears, and eye trauma. The most likely cause varies with age, medical history, and whether there has been an injury or pre-existing retinal disease.

Will vision return to normal after vitreous hemorrhage?

Vision may improve if the blood clears and the retina remains healthy. The final outcome depends on the underlying cause, how much bleeding occurred, and whether complications such as retinal damage are present.

How is vitreous hemorrhage treated?

Treatment may range from careful observation to laser treatment, injections, or surgery such as vitrectomy. The best approach depends on what caused the bleeding and whether the retina can be examined and treated safely.

References

• American Academy of Ophthalmology
• National Eye Institute
• American Society of Retina Specialists
• Mayo Clinic
• Merck Manual

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.