Pterygium

Pterygium is a non-cancerous, wedge-shaped growth of tissue on the white part of the eye that can extend toward the cornea. It is often related to long-term ultraviolet light exposure, dry or dusty environments, and chronic eye irritation.

Overview

Pterygium is a raised, triangular or wedge-shaped growth of conjunctival tissue, usually starting on the nasal side of the eye and growing toward the cornea, the clear front window of the eye. It is sometimes called surfer’s eye because it is more common in people with high exposure to sunlight, wind, sand, and reflected glare. Although its appearance can be concerning, pterygium is generally non-cancerous.

The growth develops from the conjunctiva, the thin transparent membrane that covers the white part of the eye. As it enlarges, it may remain on the white of the eye or extend onto the cornea. When it reaches the cornea, it can disturb the smooth surface of the eye, change the way light enters, and sometimes cause astigmatism or blurred vision.

Pterygium may affect one or both eyes. Some people notice only a small visible patch, while others experience chronic redness, dryness, a gritty sensation, or recurrent inflammation. The condition often progresses slowly over months or years, and not every pterygium requires surgery.

Because other eye surface conditions can look similar, an eye examination is important for an accurate diagnosis. An ophthalmologist can determine whether the growth is stable, whether the cornea is involved, and whether treatment is needed to protect comfort and vision.

Symptoms

Pterygium symptoms vary widely. A small pterygium may cause no symptoms and may be noticed only during a routine eye examination or when looking in the mirror. When symptoms occur, they often relate to inflammation and dryness of the eye surface.

Common symptoms include persistent or intermittent redness, a gritty or sandy feeling, burning, stinging, tearing, dryness, and mild itching. Some people feel as if a foreign body is in the eye, especially in windy, smoky, dusty, or air-conditioned environments. Symptoms may worsen after long periods outdoors or after prolonged screen use if blinking is reduced.

Vision changes can occur when the pterygium grows onto the cornea. The growth may alter the corneal shape, causing astigmatism, ghosting of images, glare, or blurred vision. If the tissue approaches the center of the cornea, it may interfere more directly with the line of sight.

Visible signs may include a pink, red, or fleshy triangular patch on the white part of the eye. The area may become more prominent during episodes of inflammation. Any rapid change, pain, bleeding, marked light sensitivity, or significant vision loss should be assessed promptly by an eye specialist.

Causes & Risk Factors

Pterygium is believed to develop when the surface of the eye is repeatedly irritated and damaged over time. The most important recognized contributor is long-term exposure to ultraviolet radiation from sunlight. UV light may trigger changes in conjunctival tissue and promote abnormal growth toward the cornea.

Environmental irritation also plays a role. Wind, dust, sand, smoke, dry air, and reflected sunlight from water, snow, or bright surfaces can increase stress on the eye surface. People who work outdoors, spend many hours in sunny climates, or participate in outdoor sports may have a higher risk.

Risk factors for pterygium include:

• Frequent exposure to sunlight without UV-protective eyewear
• Living or working in dry, hot, windy, or dusty environments
• Outdoor occupations such as farming, construction, fishing, or lifeguarding
• Outdoor recreation such as surfing, sailing, skiing, cycling, or running
• Chronic dry eye or recurrent eye surface irritation
• A previous pterygium, especially if preventive measures are not maintained after treatment

Pterygium is not usually caused by infection and is not contagious. It is different from a pinguecula, which is a yellowish raised area on the conjunctiva that does not grow onto the cornea. However, a pinguecula and pterygium share similar risk factors and can both be linked to sun exposure and eye surface irritation.

Diagnosis

Pterygium is usually diagnosed by an ophthalmologist or eye care professional through a clinical eye examination. The doctor examines the front surface of the eye, evaluates the size and position of the growth, and checks whether the cornea is involved. A slit-lamp microscope allows detailed visualization of the conjunctiva, cornea, tear film, and surrounding tissues.

The examination may include measurement of visual acuity to see whether vision is affected. The specialist may also assess refraction, which checks whether the pterygium is causing or worsening astigmatism. Corneal topography may be used in selected cases to map the shape of the cornea, especially when surgery is being considered or when vision is changing.

The doctor will also ask about symptoms, duration, outdoor exposure, previous eye surgery, dry eye symptoms, contact lens use, and any history of recurrent redness or irritation. This information helps distinguish pterygium from other conditions and guides treatment decisions.

Most cases are straightforward to diagnose, but unusual features may require closer evaluation. These include rapid growth, an atypical shape, abnormal pigmentation, bleeding, persistent pain, or an appearance that does not match a typical pterygium. In such cases, additional assessment may be recommended to exclude other ocular surface diseases.

Treatment Options

Pterygium treatment depends on the size of the growth, symptoms, corneal involvement, vision changes, cosmetic impact, and risk of progression. The right approach is decided by an ophthalmologist after assessment. Many mild or stable cases are managed conservatively with observation and measures to reduce irritation.

Non-surgical management focuses on comfort and protection of the eye surface. Lubricating eye drops or gels may help dryness, burning, and foreign-body sensation. During episodes of inflammation, an eye specialist may recommend short-term anti-inflammatory treatment when appropriate. Patients should not use medicated eye drops, especially steroid-containing drops, without medical guidance because inappropriate use can cause harm.

Protective strategies are an important part of management. Wraparound sunglasses with ultraviolet protection, wide-brimmed hats, and avoidance of dusty or smoky environments can reduce irritation and may help limit progression. Treating associated dry eye or eyelid inflammation may also improve symptoms and support a healthier ocular surface.

Surgery may be considered if the pterygium threatens or affects vision, causes significant astigmatism, produces persistent discomfort despite conservative care, restricts eye movement, recurs with inflammation, or creates a substantial cosmetic concern. Surgical techniques generally involve removing the abnormal tissue and covering the area with healthy conjunctival tissue or another grafting method to reduce recurrence risk. The specialist will explain the expected benefits, risks, aftercare, and follow-up schedule based on the individual case.

Living With / Prognosis

Most people with pterygium can maintain good vision and comfort, especially when the condition is detected early and monitored appropriately. A small pterygium may remain stable for years. If symptoms are mild, regular eye checks and daily protective habits may be enough to manage the condition.

Living with pterygium often means paying attention to environmental triggers. Sunglasses that block UV rays, hats, protective eyewear in dusty workplaces, and regular lubrication for dry eyes can reduce irritation. People who spend many hours outdoors should make eye protection a consistent habit, not only on sunny days but also in bright or reflective conditions.

After surgery, recurrence is possible, which means the growth can return. The likelihood of recurrence varies depending on individual factors, surgical technique, postoperative healing, and ongoing UV or environmental exposure. Follow-up visits are important so the eye can be monitored during healing and any inflammation can be treated early.

Pterygium is usually a manageable condition rather than an emergency. With specialist assessment and long-term prevention, many patients achieve good symptom control. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat eye surface conditions, including pterygium, for international patients when ophthalmic care abroad is being considered.

When to See a Doctor

A person should see an ophthalmologist if a new growth appears on the white of the eye, especially if it is red, raised, or moving toward the cornea. Even when the growth is painless, an eye examination helps confirm that it is pterygium and not another condition requiring different care.

Medical assessment is recommended if symptoms such as redness, burning, tearing, dryness, foreign-body sensation, or irritation are persistent or recurrent. An appointment is also important if the pterygium appears to be enlarging, if the eye becomes frequently inflamed, or if the appearance of the eye is causing concern.

Prompt evaluation is needed if there is blurred vision, increasing astigmatism, glare, double or distorted vision, significant pain, light sensitivity, discharge, bleeding, or a rapid change in the size or color of the lesion. These features do not necessarily mean a serious problem, but they should be checked without delay.

People who have previously had pterygium surgery should attend recommended follow-up visits and seek advice if redness, thickening, or new tissue growth appears near the surgical area. Ongoing UV protection and eye surface care remain important even after successful treatment.

Frequently asked questions

What is pterygium?

Pterygium is a non-cancerous growth of tissue on the conjunctiva, the clear membrane over the white part of the eye. It often has a triangular shape and may grow toward or onto the cornea. It is commonly linked to long-term sun, wind, dust, and dry-eye irritation.

Is pterygium dangerous?

Pterygium is usually benign and not dangerous in the sense of being cancerous. However, it can become uncomfortable and may affect vision if it grows onto the cornea or changes the corneal shape. An ophthalmologist can monitor its size and recommend treatment if needed.

Can pterygium go away on its own?

A pterygium typically does not disappear on its own once it has formed. Mild symptoms may improve with lubrication, UV protection, and control of irritation, but the visible growth usually remains. If it progresses or affects vision, an eye specialist may discuss surgical options.

How is pterygium treated without surgery?

Non-surgical care may include lubricating drops, protection from UV light, avoidance of dust and wind, and treatment of associated dry eye. During inflamed episodes, an ophthalmologist may recommend appropriate short-term medication. These measures can improve comfort but do not usually remove the growth.

When is pterygium surgery needed?

Surgery may be considered when pterygium affects vision, causes significant astigmatism, grows toward the center of the cornea, or causes persistent irritation despite conservative treatment. It may also be considered for substantial cosmetic concern. The decision is individualized after a full ophthalmic examination.

Can pterygium come back after surgery?

Yes, pterygium can recur after surgery, although modern surgical techniques and careful aftercare aim to reduce this risk. Recurrence is more likely when the eye continues to be exposed to strong UV light, dust, wind, or chronic irritation. Regular follow-up and consistent eye protection are important after treatment.

How can pterygium be prevented?

Prevention focuses on reducing UV exposure and eye surface irritation. Wearing UV-protective wraparound sunglasses, using a wide-brimmed hat outdoors, and protecting the eyes in windy or dusty environments can help. Managing dry eye and avoiding smoke or harsh air flow may also reduce irritation.

References

• American Academy of Ophthalmology
• National Eye Institute
• Mayo Clinic
• Cochrane Eyes and Vision
• Royal College of Ophthalmologists

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.