Pterygium is a fleshy growth that appears on the surface of the eye, typically starting near the nose and spreading toward the center of vision. While not cancerous, this condition can cause discomfort, redness, and in some cases affect how clearly you see. Understanding the available treatments—from simple eye drops to advanced surgical techniques—can help you manage this condition and protect your vision for years to come.

What Does Treatment Aim to Achieve?

Treatment for pterygium focuses on different goals depending on how much the growth affects your daily life. For many people, the main aim is to control symptoms like irritation, redness, and the feeling that something is stuck in the eye. Others may need treatment to prevent the growth from spreading further across the cornea, which is the clear front window of your eye. When a pterygium grows large enough to reach the center of your vision, treatment becomes necessary to restore or preserve clear sight.

The approach your doctor recommends depends on several factors. These include the size of the pterygium, how fast it appears to be growing, whether it causes you discomfort, and whether your vision is affected. Small, stable growths that don’t bother you might not need any treatment at all—just regular monitoring to make sure they’re not getting bigger. Larger or more bothersome pterygia may require active treatment, either with medications or surgery.

It’s important to understand that pterygium is not a cancer. It won’t spread to other parts of your body or inside your eye. However, it can continue to grow across the surface of the eye if left untreated. Medical societies and eye care specialists have established guidelines for when to observe, when to treat with medication, and when surgery is the best option. Beyond these standard approaches, researchers are also exploring new therapies in clinical trials that may offer better outcomes in the future.

Standard Treatment Options

Most people with pterygium start with conservative, non-surgical treatments. These methods help manage symptoms and may slow the growth’s progression. The most common first-line treatment involves using artificial tears—lubricating eye drops that you can buy without a prescription. These drops help keep the eye surface moist, reducing dryness, grittiness, and irritation that many people with pterygium experience.

If artificial tears aren’t enough to control inflammation and discomfort, your eye doctor may prescribe steroid eye drops or ointments. These medications contain anti-inflammatory agents that reduce redness, swelling, and pain. Steroids work by calming down the immune response in the eye tissue. However, they cannot be used indefinitely because long-term steroid use can increase the risk of side effects like elevated eye pressure or cataracts. Your doctor will typically prescribe steroids for short periods—weeks to a few months—to control acute flare-ups.

Some doctors also recommend anti-allergy drops if your pterygium seems to worsen with exposure to dust, pollen, or other irritants. These drops contain medications that block histamine or other chemicals involved in allergic reactions, helping to reduce itching and redness.

An essential part of standard treatment is protecting your eyes from ultraviolet (UV) light. Since UV exposure is the primary cause of pterygium, wearing sunglasses that block 100% of UVA and UVB rays is strongly recommended. Look for wraparound styles or close-fitting frames that prevent sunlight from reaching your eyes from the sides. Wearing a wide-brimmed hat adds extra protection, especially during midday hours when the sun is strongest. This protective approach is recommended year-round, not just in summer, because UV rays can reflect off surfaces like water, sand, snow, and even windows.

Conservative treatment can continue for years as long as the pterygium remains stable and symptoms are controlled. You’ll need regular check-ups—typically every one to two years—so your eye doctor can measure the growth and determine if it’s advancing toward your visual axis.

When Surgery Becomes Necessary

Surgery to remove a pterygium is considered when conservative treatments fail to relieve symptoms or when the growth threatens your vision. Common reasons for surgery include a pterygium that has grown far enough onto the cornea to block or distort vision, causes persistent irritation that doesn’t respond to drops, restricts eye movement, makes wearing contact lenses impossible, or simply bothers you cosmetically.

The surgical procedure, called pterygium excision, is typically performed as an outpatient procedure. This means you go home the same day. The surgery usually takes 30 minutes to an hour and is done under local anesthesia with sedation if needed. During the procedure, the surgeon carefully removes the fleshy growth from the cornea and the white part of the eye.

However, simply cutting out the pterygium isn’t enough. Studies show that when surgeons only remove the growth without any additional steps, the pterygium returns in about 80% of cases. Most regrowth happens within the first year after surgery. To prevent recurrence, surgeons have developed more advanced techniques.

The most effective approach is called conjunctival autograft. After removing the pterygium, the surgeon takes a small piece of healthy tissue from another part of your eye—usually from under the upper eyelid where it won’t be visible. This healthy tissue is then grafted onto the area where the pterygium was removed. The graft acts as a barrier, preventing the pterygium from growing back. With this technique, recurrence rates drop significantly, from 80% down to about 33% in some studies, and can be reduced even further with additional measures.

Some surgeons use antimetabolites—medications like mitomycin C or 5-fluorouracil—applied directly to the surgical site during or after the procedure. These drugs prevent abnormal cell growth and can further reduce recurrence rates. However, they must be used carefully because they can cause complications like scleral melting (thinning of the eye wall) if not applied properly.

Another option gaining attention is the use of amniotic membrane transplantation. Instead of using tissue from your own eye, the surgeon uses specially prepared amniotic membrane (the inner layer of the placenta) as a biological patch. This membrane promotes healing and reduces inflammation and scarring.

Recovery after pterygium surgery typically takes about six weeks, though you may notice improvement sooner. During this time, you’ll need to use prescribed eye drops to prevent infection and reduce inflammation. You should avoid rubbing your eyes and stay away from dusty or windy environments. Follow-up visits are important to ensure proper healing and catch any signs of recurrence early.

New Therapies Being Explored in Clinical Trials

While surgery with conjunctival autografting is currently the gold standard for preventing pterygium recurrence, researchers continue to explore new approaches that might offer even better outcomes. These innovative therapies are being tested in clinical trials around the world, including in the United States, Europe, and Australia.

One promising area of research involves anti-VEGF medications. VEGF stands for vascular endothelial growth factor, a protein that promotes the growth of blood vessels. Pterygia contain many blood vessels, and blocking VEGF might prevent them from growing. In some studies, doctors have injected anti-VEGF medications like bevacizumab directly under the pterygium before surgery or as a standalone treatment. Early results suggest this approach may slow progression and reduce recurrence when combined with surgical removal and grafting. These injections are still being studied to determine the optimal timing, dosage, and long-term safety.

Another experimental approach involves interferon alpha-2b eye drops. Interferon is a protein that helps regulate the immune system and has been used to treat various conditions, including some cancers and viral infections. When used as eye drops after pterygium surgery, interferon alpha-2b appears to reduce recurrence rates, particularly in the first year after surgery. This treatment is being investigated in Phase II clinical trials to determine its effectiveness compared to standard post-operative care. The eye drops work by interfering with the abnormal cell growth that leads to pterygium reformation.

Some research groups are exploring modifications to surgical techniques themselves. One innovative method, sometimes referred to as extensive excision with limbal-sparing autograft, involves removing not just the pterygium but also a wider area of surrounding tissue, including deeper layers. The surgeon then covers this larger area with a graft taken from the limbus (the border between the cornea and the white of the eye) without disturbing the limbal stem cells. Long-term studies of this technique have shown very low recurrence rates—below 1% in some centers—without requiring the use of antimetabolites. This approach is still being refined and evaluated in different patient populations.

Researchers are also investigating the role of corneal topography-guided procedures. This technology creates detailed maps of the cornea’s shape, allowing surgeons to identify exactly how much a pterygium has distorted vision. By combining this information with customized surgical planning, doctors hope to improve both cosmetic and visual outcomes. Some centers are testing whether corneal topography can help predict which pterygia are most likely to grow aggressively and would benefit from earlier surgical intervention.

Most common treatment methods

• Lubricating eye drops (artificial tears)
  • Over-the-counter drops that keep the eye surface moist
  • Help reduce dryness, grittiness, and irritation
  • Can be used long-term without significant side effects
  • Often the first treatment recommended for mild symptoms
• Anti-inflammatory medications
  • Steroid eye drops or ointments prescribed for short-term use
  • Reduce redness, swelling, and inflammation
  • Cannot be used indefinitely due to potential side effects like increased eye pressure
  • Typically used during acute flare-ups lasting weeks to months
• UV protection
  • Wearing sunglasses that block 100% of UVA and UVB rays
  • Wraparound or close-fitting styles provide better protection
  • Wide-brimmed hats offer additional protection
  • Recommended year-round, especially during midday hours
• Pterygium excision with conjunctival autograft
  • Surgical removal of the pterygium followed by grafting healthy tissue from another part of the eye
  • Performed as an outpatient procedure under local anesthesia
  • Takes about 30 minutes to one hour
  • Reduces recurrence rates significantly compared to simple excision
  • Recovery typically takes about six weeks
• Antimetabolite therapy
  • Medications like mitomycin C or 5-fluorouracil applied during or after surgery
  • Prevents abnormal cell growth that leads to recurrence
  • Must be applied carefully to avoid complications like scleral thinning
  • Further reduces recurrence rates when combined with surgical grafting
• Amniotic membrane transplantation
  • Using specially prepared placental tissue as a biological patch after pterygium removal
  • Promotes healing and reduces inflammation
  • May reduce scarring and improve cosmetic outcomes
  • An alternative to conjunctival autograft in some cases