R R

What Is a Retinal Neovascular Membrane?

A retinal neovascular membrane is a growth of abnormal new blood vessels, often mixed with fibrous tissue, that forms on or beneath the retina. The vessels are fragile and can leak fluid or bleed, which can distort vision. In the macula, this process is often called macular neovascularization and is linked with wet age-related macular degeneration. In other settings, new vessels can grow from ischemic retina and form membranes that pull on the retina over time.

Link to This Resource Page

Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.

To display this...

What Is a Retinal Neovascular Membrane?

A retinal neovascular membrane is a growth of abnormal new blood vessels, often mixed with fibrous tissue, that forms on or beneath the retina. The vessels are fragile and can leak fluid or bleed, which can distort vision. In the macula, this process is often called macular neovascularization and is linked with wet age-related macular degeneration. In other settings, new vessels can grow from ischemic retina and form membranes that pull on the retina over time.

read more about retinal neovascular membrane ...

Copy this HTML:

Copy HTML Copied!

What Causes a Retinal Neovascular Membrane?

Macular neovascular membranes often form in age-related macular degeneration when signals such as VEGF drive new vessel growth beneath the macula. High myopia and inflammatory chorioretinal disease can also trigger neovascular membranes near the macula. Retinal ischemia from diabetic retinopathy or retinal vein occlusion can lead to new vessels on the retinal surface that grow with fibrous tissue. Sickle cell retinopathy and other vascular disorders can also drive neovascular growth when the retina lacks oxygen. A retina specialist uses imaging to identify the membrane location and the underlying driver.

What Are Retinal Neovascular Membrane Symptoms?

Symptoms often include distortion, where straight lines look wavy or parts of words look shifted. Central blur can develop when fluid collects in or under the macula. A dark or gray spot can appear if bleeding occurs beneath the retina. Floaters can occur when bleeding enters the vitreous, especially in proliferative diabetic eye disease. Symptoms can change quickly, so new distortion or sudden blur should be checked promptly.

How Is a Retinal Neovascular Membrane Diagnosed?

Optical coherence tomography (OCT) is commonly used to detect fluid, bleeding, and the membrane's effect on retinal layers. Fluorescein angiography can show leakage patterns and can confirm active neovascular growth. OCT angiography can map abnormal vessels without dye and can support monitoring between visits. A dilated exam checks for hemorrhage, traction, and related findings such as diabetic retinopathy changes. Home checks with an Amsler grid can help detect new distortion, but imaging is still needed for diagnosis.

How Is a Retinal Neovascular Membrane Treated?

Anti-VEGF injections are often first-line treatment for active leaking macular neovascular membranes because the medicine targets signals that drive vessel growth. Treatment is repeated based on OCT findings and symptom change, since activity can return after stopping. When neovascular growth is driven by widespread retinal ischemia, panretinal laser treatment can reduce the drive for new vessel formation. Vitrectomy surgery can be used when dense vitreous hemorrhage or tractional pulling threatens the macula. Treating the underlying cause, such as diabetes control or inflammatory disease management, helps reduce recurrence risk.

Frequently Asked Questions About a Retinal Neovascular Membrane

Is a Retinal Neovascular Membrane the Same as Wet AMD?

It is a defining feature of wet age-related macular degeneration when the membrane involves the macula. Neovascular membranes can also occur from myopia, inflammation, or retinal ischemia. Imaging helps identify the cause and exact location.

Do Anti-VEGF Injections Stop a Neovascular Membrane?

Anti-VEGF injections often shrink leakage and stabilize vision, and many patients see improvement in distortion. Repeat injections are often needed because the membrane can become active again. OCT monitoring guides timing.

How Can a Neovascular Membrane Be Monitored at Home?

An Amsler grid can help detect new waviness or missing areas in central vision. Checking one eye at a time helps catch early changes that the other eye can mask. Any new change should trigger a retina visit soon.

References

What Are Macular Neovascular Membranes (MNV)?. American Academy of Ophthalmology. https://www.aao.org/eye-health/diseases/choroidal-neovascular-membranes. Date Accessed February 4, 2026.

Choroidal Neovascularization. EyeWiki. https://eyewiki.org/Choroidal_Neovascularization. Date Accessed February 4, 2026.

Age-Related Macular Degeneration. National Eye Institute (NIH). https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/age-related-macular-degeneration. Date Accessed February 4, 2026.

Anti-VEGF Treatments. American Academy of Ophthalmology. https://www.aao.org/eye-health/drugs/anti-vegf-treatments. Date Accessed February 4, 2026.

Wet Age-Related Macular Degeneration (AMD). StatPearls (NCBI Bookshelf). https://www.ncbi.nlm.nih.gov/books/NBK572147/. Date Accessed February 4, 2026.