Epiretinal Membrane: What You Need to Know
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Who Is at Risk?
Epiretinal membranes become more common as we age, and certain factors can raise the likelihood of developing one. Knowing your risk factors helps guide how often your eyes should be monitored and what signs to watch for.
Age is the strongest risk factor for epiretinal membranes. They are rare in younger adults but become increasingly common after age 50. This is closely tied to the natural aging of the vitreous gel and the higher rate of posterior vitreous detachment in older individuals. Both men and women are affected, though some studies have found slightly higher rates in women and in individuals with longer eye length, which is associated with nearsightedness.
Several conditions and history factors increase the chance of developing an epiretinal membrane. A retina specialist may recommend more frequent monitoring if any of these apply to you.
- Age over 50
- Posterior vitreous detachment
- History of retinal tears, retinal detachment, or retinal surgery
- Diabetic retinopathy or retinal vein occlusion
- Uveitis or other inflammatory eye conditions
- Previous cataract surgery or other intraocular procedures
Research has also linked epiretinal membranes to higher body mass index, smoking, elevated blood sugar, and high cholesterol. Having an epiretinal membrane in one eye increases the chance of eventually developing one in the other eye, though this does not happen in every case. Regular monitoring of both eyes is important for anyone who has received this diagnosis.
Recognizing the Signs and Symptoms
Many epiretinal membranes develop slowly, and some never cause noticeable vision problems. When symptoms do appear, they tend to come on gradually. Knowing what to look for can help you seek care at the right time.
The most common symptom is metamorphopsia, a term for seeing straight lines as wavy, bent, or distorted. This happens because the membrane is wrinkling the surface of the macula. Other symptoms include blurred central vision, difficulty reading or making out fine details, and a gray or hazy patch in the center of vision. Some people notice that objects look slightly smaller through the affected eye, a phenomenon called micropsia. In some cases, double vision may occur in one eye alone.
Because epiretinal membranes usually affect only one eye, the other eye often compensates without the person realizing it. Many people discover the problem only when they accidentally cover their stronger eye. Checking each eye separately, by covering one at a time while looking at a fixed point, is a simple habit that can help catch changes early.
An Amsler grid is another helpful self-monitoring tool. It is a pattern of evenly spaced straight lines with a dot at the center. If the lines appear wavy, bent, or missing when you view the grid with one eye at a time, that is a reason to schedule an evaluation with a retina specialist.
Not all epiretinal membranes progress. Some remain thin and stable for many years without causing significant visual problems. However, if the membrane continues to contract and thicken, symptoms may gradually worsen. Tasks that rely on sharp central vision, such as reading, driving, and recognizing faces, may become more difficult over time. Any noticeable worsening of distortion, blurriness, or central vision should prompt a prompt retinal evaluation.
Treatment Options
Treatment depends on the severity of the membrane, how much it is affecting vision, and how much it interferes with daily life. There is no medication or eye drop that can dissolve or shrink an epiretinal membrane, so the options are either watchful waiting or surgery.
When the membrane is thin, vision remains good, and symptoms are minimal, observation is the recommended approach. No drops, nutritional supplements, or medications can treat the membrane itself. During this period, a retina specialist will monitor your vision and retinal imaging at regular intervals. If the membrane remains stable and vision stays adequate for daily activities, surgery may never be needed.
When an epiretinal membrane causes significant vision loss or bothersome distortion, the treatment is a surgical procedure called pars plana vitrectomy with membrane peeling. During this procedure, a retina specialist makes small incisions in the wall of the eye, carefully removes the vitreous gel, and peels the membrane away from the retinal surface. Surgery is generally considered when visual acuity drops below 20/40 or when distortion significantly interferes with daily activities. The majority of patients who undergo this surgery experience meaningful improvement in vision and a reduction in distortion.
During vitrectomy for an epiretinal membrane, many retina specialists also remove a thin inner layer of the retina called the internal limiting membrane, or ILM. The ILM acts as a natural scaffold where membrane cells can regrow. By removing it during the initial surgery, the risk of recurrence is significantly reduced. Specialized dyes are often used during surgery to stain both the epiretinal membrane and the ILM, making these nearly transparent layers easier to identify and peel safely.
Vitrectomy surgery can accelerate the development of a cataract in patients who have not yet had cataract surgery. Because of this, many retina specialists offer a combined approach called phaco-vitrectomy, which addresses both the epiretinal membrane and the cataract in one operation. This approach can reduce the need for a second surgery. Whether combining the procedures is appropriate depends on the current condition of the lens, the patient's age, and overall eye health, all of which a retina specialist will review with you before making a recommendation.
What to Expect from Surgery and Recovery
If your retina specialist recommends surgery, knowing what to expect before, during, and after the procedure can help you prepare and set realistic goals for your recovery.
Before scheduling surgery, a retina specialist will perform a thorough evaluation including OCT imaging, visual acuity testing, and a complete retinal examination. These tests help determine whether surgery is likely to improve vision and what degree of improvement is reasonably expected. Research has shown that earlier surgical intervention, particularly when preoperative vision is 20/50 or better, is associated with more favorable long-term outcomes. Your retina specialist will review all of this information with you before making a recommendation.
Vitrectomy with membrane peeling is typically performed as an outpatient procedure under local anesthesia and usually takes between 30 and 60 minutes. After the membrane is peeled, the eye is filled with a balanced salt solution that your eye will naturally replace with its own fluid over time. Following surgery, you will likely need to use antibiotic and anti-inflammatory eye drops for several weeks. Vision improvement is gradual and typically occurs over weeks to months as the retina heals. Full visual recovery can take three to six months or sometimes longer.
Vitrectomy is effective for most patients, but it is important to understand that results vary. How much vision improves depends on how long the membrane was present before surgery, the degree of retinal distortion, and the health of the underlying retinal layers. Some patients experience significant gains in both sharpness and reduction of distortion. Others may see more modest improvement. Distortion often improves after surgery but may not resolve completely, particularly when a membrane has been present and causing traction for a long time. This is one reason why timely monitoring and appropriately timed surgery matter.
Living With an Epiretinal Membrane
For those with mild membranes that do not yet require surgery, a few practical strategies can help you manage daily life and stay on top of any changes. Staying proactive about monitoring is one of the most important things you can do.
Brighter lighting for reading and close work can improve comfort when central vision is mildly affected. Magnifying devices and large-print materials are useful tools as well. Because epiretinal membranes typically affect only one eye, many people continue to function well in daily activities using their stronger eye. Tasks that rely heavily on depth perception or fine central vision from both eyes simultaneously may feel more challenging, and it is reasonable to discuss any functional concerns with your retina specialist.
Checking your vision at home regularly is one of the best ways to detect changes between appointments. Using an Amsler grid is a simple and effective method. Hold the grid at comfortable reading distance, cover one eye, and look at the central dot. Note whether the surrounding lines appear straight, wavy, or broken. Repeat with the other eye.
Perform this check at least once a week. If you notice new waviness, missing areas, or increasing distortion that was not there before, contact your retina specialist promptly rather than waiting for your next scheduled visit.
Many mild epiretinal membranes remain stable for years and cause little to no visual impairment over time. For those who do require surgery, the majority experience meaningful improvement in both sharpness and distortion. Advances in imaging technology and surgical technique continue to improve outcomes. Emerging tools, including artificial intelligence models that analyze OCT findings, are showing promise in predicting which patients are most likely to benefit from early surgical intervention, helping retina specialists personalize care more precisely than ever before.
Frequently Asked Questions
These answers address common questions patients ask after being diagnosed with an epiretinal membrane.
Spontaneous separation of an epiretinal membrane from the retinal surface does occasionally occur, but it is uncommon. Most membranes remain in place once they form and do not dissolve on their own over time. Eye drops and supplements cannot treat or remove the membrane. The key is regular monitoring with a retina specialist so that any progression is caught early and treatment can be timed appropriately if it becomes necessary.
If your vision is still functional and the membrane has not caused significant distortion, choosing observation over surgery is entirely reasonable. Not every epiretinal membrane requires an operation. However, delaying surgery for too long after significant vision loss has occurred can limit how much improvement is possible. The decision is individual, and your retina specialist will help you understand the tradeoffs based on your specific OCT findings and how the membrane is affecting your daily life.
The two most common thresholds are a drop in visual acuity to below 20/40 and distortion that meaningfully interferes with daily activities such as reading, driving, or recognizing faces. That said, the decision is not based on acuity alone. Your retina specialist will also consider the rate of change, your OCT findings, and what you need from your vision based on your lifestyle. If you feel that your vision is limiting you in ways that matter, that is always worth discussing at your next appointment.
Recurrence is possible but uncommon, especially when the internal limiting membrane is also removed during the procedure. Removing the ILM eliminates the scaffold on which new membrane cells tend to grow, significantly lowering the likelihood of regrowth. Your retina specialist will continue to monitor your eye with OCT imaging after surgery to check for any signs of recurrence and ensure your recovery is progressing as expected.
Having an epiretinal membrane in one eye is a known risk factor for eventually developing one in the other eye, but it does not guarantee that will happen. Many people have a membrane in only one eye throughout their lifetime. The most practical step is to ensure that both eyes are examined with OCT at regular intervals. That way, if a membrane does develop in the second eye, it can be detected early and monitored carefully from the start.
There is no proven way to prevent an epiretinal membrane, since the most common cause, posterior vitreous detachment, is a normal part of aging. However, managing conditions that are associated with secondary membranes, such as keeping diabetes well controlled, treating inflammation promptly, and addressing retinal tears early, can reduce the risk of those specific triggers. Regular comprehensive eye exams remain the most reliable way to detect a membrane before it causes significant vision changes.
Schedule a Retinal Evaluation
If you are experiencing blurred central vision, distortion of straight lines, or any changes to your central sight, we encourage you to schedule a comprehensive evaluation with our retina specialists. Our team uses advanced OCT imaging and personalized care planning to accurately diagnose and manage epiretinal membranes at every stage. Whether you need monitoring or are ready to discuss surgical options, we are here to guide you with the expertise and attention your vision deserves.