Eye Growth? Why Your Cornea Is Overgrowing & Medical Pterygium Steps

If you've noticed a fleshy growth on the white of your eye that seems to be creeping toward the colored part, you may be dealing with pterygium (pronounced tuh-RIJ-ee-um). Many people describe it as "eye growth" or "extra skin on the eye." While it can look alarming, a pterygium is usually non-cancerous. That said, it should not be ignored—especially if it begins to affect your vision.

Below, we'll explain what pterygium is, why it happens, how it progresses, and what medical steps may be needed.

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What Is a Pterygium?

A pterygium is a wedge-shaped growth of fleshy tissue that starts on the conjunctiva (the clear membrane covering the white of the eye) and extends onto the cornea (the clear front window of the eye).

It often begins on the side closest to the nose but can develop on either side.

Although it's commonly called "surfer's eye," anyone can develop pterygium—not just people who surf.

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Why Does the Cornea "Overgrow"?

The cornea itself isn't truly overgrowing. Instead, the conjunctival tissue thickens and migrates onto the cornea. This happens because of chronic irritation and UV exposure.

The main causes include:

• Ultraviolet (UV) light exposure (sunlight is the biggest risk factor)
• Wind exposure
• Dust and sand
• Dry climates
• Chronic eye irritation
• Outdoor occupations (construction, farming, fishing, lifeguarding)

Over time, UV damage causes changes in the conjunctival cells. These cells begin to grow abnormally and invade the cornea. This is why pterygium is more common in people who live closer to the equator or spend significant time outdoors.

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What Does a Pterygium Look Like?

Early on, pterygium may appear as:

• A small pink or white bump
• A slightly raised area near the corner of the eye
• A visible blood vessel pattern

As it grows, it may:

• Extend toward the pupil
• Become thicker and more noticeable
• Cause redness and irritation

Some people have a small, stable pterygium that never causes problems. Others experience progressive growth.

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Symptoms of Pterygium

Many cases are mild. However, symptoms can include:

• Redness
• Dryness
• Burning or stinging
• A gritty or sandy feeling
• Blurred vision (if the growth reaches the visual axis)
• Astigmatism (irregular curvature of the cornea)

If the pterygium grows large enough to distort the cornea, it can change how light enters the eye, leading to vision changes.

If your symptoms feel more sudden or severe—or if you're experiencing significant pain or light sensitivity—you may want to check if you're dealing with a Corneal Injury instead, which requires immediate medical attention.

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Is Pterygium Dangerous?

In most cases, pterygium is not life-threatening and not cancerous. However, it can become serious if:

• It blocks the visual axis (center of the cornea)
• It causes significant astigmatism
• It leads to chronic inflammation
• It recurs repeatedly after surgery

Rarely, abnormal-looking growths may resemble pterygium but represent other eye conditions. That's why proper diagnosis by an eye doctor is important.

If you experience sudden vision loss, severe eye pain, or trauma to the eye, seek medical care urgently.

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Medical Steps for Pterygium

Treatment depends on severity. Not all cases require surgery.

1. Conservative (Non-Surgical) Treatment

For mild cases, doctors often recommend:

• Lubricating artificial tears to reduce dryness and irritation
• Anti-inflammatory eye drops (short-term use)
• Topical steroid drops for flare-ups (used carefully under supervision)
• UV-blocking sunglasses to slow progression

These treatments help control symptoms but do not remove the growth.

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2. Monitoring

If the pterygium is small and not affecting vision:

• Regular eye exams may be sufficient
• Your doctor will measure its size
• Photos may be taken to track growth

Some pterygia remain stable for years.

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3. Surgical Removal

Surgery may be recommended if:

• Vision is affected
• The growth is approaching the pupil
• Significant astigmatism develops
• Chronic discomfort persists
• Cosmetic concerns are severe

What Happens During Surgery?

Modern pterygium surgery typically involves:

• Removing the abnormal tissue
• Placing a conjunctival autograft (healthy tissue from your own eye) over the area
• Securing the graft with sutures or tissue adhesive

This graft technique significantly reduces recurrence rates compared to older methods.

Surgery is usually outpatient and performed under local anesthesia.

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Does Pterygium Come Back?

Recurrence is the main concern after surgery.

Recurrence rates vary depending on:

• Surgical technique
• UV exposure after surgery
• Age (younger patients have higher recurrence risk)
• Environmental exposure

Using modern grafting techniques lowers recurrence to around 5–15% in experienced hands.

Wearing UV-protective sunglasses after surgery is critical to reduce risk.

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How to Prevent Pterygium

Prevention focuses on reducing UV and environmental exposure.

Protective steps include:

• Wearing wraparound sunglasses with 100% UV protection
• Using a wide-brimmed hat outdoors
• Avoiding prolonged sun exposure when possible
• Using artificial tears in dry environments
• Protecting eyes from wind and dust

Even on cloudy days, UV rays can affect your eyes.

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When to Speak to a Doctor

You should speak to an eye doctor if you notice:

• A new growth on your eye
• Increasing redness or irritation
• Changes in vision
• Blurred or distorted sight
• Persistent discomfort

Seek urgent care if you experience:

• Sudden vision loss
• Severe eye pain
• Eye trauma
• Signs of infection (swelling, discharge, intense redness)

While pterygium is usually benign, any new or changing eye growth deserves professional evaluation.

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Frequently Asked Questions About Pterygium

Is pterygium cancer?

No. Pterygium is non-cancerous. However, a doctor should confirm the diagnosis.

Can eye drops cure pterygium?

No. Drops manage symptoms but do not eliminate the growth.

Will it go away on its own?

No. Once formed, a pterygium does not disappear without surgery.

Can it affect both eyes?

Yes. It can occur in one or both eyes.

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The Bottom Line

A pterygium is a common, usually non-cancerous eye growth caused primarily by UV exposure and chronic irritation. While many cases remain mild and manageable with lubrication and protection, some can grow large enough to affect vision.

The key points to remember:

• Most pterygium cases are not dangerous.
• UV protection is critical for prevention and after treatment.
• Surgery is effective when needed.
• Early evaluation helps prevent complications.

If you're noticing eye discomfort, pain, or vision changes and want quick clarity on whether it could be related to damage or injury to your cornea, try Ubie's free AI-powered Corneal Injury symptom checker to help guide your next steps.

Most importantly, speak to a doctor if you notice vision changes, worsening symptoms, or anything that concerns you. Your eyes are delicate organs, and early medical guidance is always the safest step when something doesn't feel right.