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What Is Subretinal Neovascularization?

Subretinal neovascularization is the growth of abnormal new blood vessels under the retina or under the retinal pigment epithelium. These vessels are fragile and can leak fluid or blood, which can distort central vision. It is often discussed as choroidal neovascularization and is a common complication of wet age-related macular degeneration. Without treatment, leakage can lead to scarring and lasting central vision loss.

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What Is Subretinal Neovascularization?

Subretinal neovascularization is the growth of abnormal new blood vessels under the retina or under the retinal pigment epithelium. These vessels are fragile and can leak fluid or blood, which can distort central vision. It is often discussed as choroidal neovascularization and is a common complication of wet age-related macular degeneration. Without treatment, leakage can lead to scarring and lasting central vision loss.

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What Causes Subretinal Neovascularization?

The most common cause is age-related macular degeneration, where changes in the macula promote new vessel growth. High myopia can also trigger subretinal neovascularization, especially in eyes with degenerative myopic changes. Inflammatory eye disease, such as multifocal choroiditis, can lead to new vessels after repeated tissue injury. Other causes include ocular histoplasmosis, angioid streaks, and trauma-related scars in the back of the eye. A retina specialist uses imaging patterns and history to identify the most likely driver.

What Are Subretinal Neovascularization Symptoms?

Symptoms often include central blur and distortion, where straight lines look bent or wavy. A dark or gray spot in the center of vision can appear when fluid or bleeding involves the macula. Colors can look less vivid, and contrast can drop, which makes reading harder. Symptoms can start subtly and then worsen quickly if bleeding occurs. Sudden distortion or rapid central vision change should be checked promptly because early treatment can limit scarring.

How Is Subretinal Neovascularization Diagnosed?

Optical coherence tomography (OCT) is commonly used to detect fluid, pigment epithelial changes, and subretinal tissue linked to new vessels. Fluorescein angiography helps 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, scarring, and other macular disease signs that guide treatment decisions. Home monitoring with an Amsler grid can help catch new distortion between appointments, but imaging is still needed for diagnosis.

How Is Subretinal Neovascularization Treated?

First-line treatment is often anti-VEGF injections, which reduce leakage and help stabilize or improve vision in many cases. Treatment is typically repeated on a schedule based on response seen on OCT and symptom change. Photodynamic therapy can be used in selected situations, such as specific vessel patterns or when injections alone do not control leakage. When inflammation is the trigger, treatment also addresses the inflammatory disease to reduce repeat injury. Regular follow-up matters because activity can recur and needs timely retreatment.

Frequently Asked Questions About Subretinal Neovascularization

Is Subretinal Neovascularization the Same as Wet AMD?

It is a defining feature of wet AMD, but it can also happen from other causes such as myopia or inflammation. Wet AMD refers to a broader macular condition, while subretinal neovascularization describes the abnormal vessel growth itself. Imaging helps confirm the cause and guides the plan.

Can Subretinal Neovascularization Be Reversed?

Active leakage can often be controlled, and swelling can improve with treatment. Scar tissue that has already formed usually does not reverse. Early treatment helps limit permanent central vision damage.

How Urgent Is Sudden Distortion or a New Central Spot?

It should be evaluated promptly, especially when distortion appears suddenly or worsens over days. Bleeding under the retina can cause rapid vision loss. Early retina care can reduce long-term impact.

References

Age-Related Macular Degeneration. National Eye Institute. 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/treatments/anti-vegf-injections. Date Accessed: February 4, 2026.

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

Presumed Ocular Histoplasmosis Syndrome. EyeWiki. https://eyewiki.org/Presumed_Ocular_Histoplasmosis_Syndrome. Date Accessed: February 4, 2026.

Fluorescein Angiography. EyeWiki. https://eyewiki.org/Fluorescein_Angiography. Date Accessed: February 4, 2026.