Pterygium: Eye Surface Growth and Sun Exposure Risks

Pterygium is a usually benign growth of tissue on the surface of the eye, often associated with long-term exposure to sunlight, wind, dust and dry conditions. While many cases are mild, a growing or irritated pterygium can affect comfort, appearance and vision, so an eye examination is important.

Overview

Pterygium is a raised, wedge-shaped growth of conjunctival tissue on the surface of the eye. The conjunctiva is the clear membrane that covers the white part of the eye. A pterygium usually begins on the side of the eye closest to the nose and may slowly grow toward the cornea, the clear front window of the eye.

Although its appearance can be concerning, pterygium is generally benign, meaning it is not cancer. It is sometimes called surfer’s eye because it is more common in people who spend many hours outdoors in bright sunlight, wind, sand or dust. It may affect one eye or both eyes.

Some pterygia remain small and cause few symptoms. Others become inflamed, red or uncomfortable, or they may change the shape of the cornea and blur vision. Regular eye checks help monitor whether the growth is stable or progressing and guide the best treatment plan.

Symptoms

A small pterygium may be noticed only as a pale, pink or fleshy area on the white of the eye. It often has a triangular shape, with the tip pointing toward the center of the cornea. The surface may look more visible when the eye is irritated or dry.

Common symptoms include eye redness, burning, itching, dryness, watering and a gritty feeling as if something is in the eye. These symptoms may worsen after sun exposure, in air-conditioned environments, during windy weather or after long periods of screen use, which can reduce blinking and increase dryness.

If the pterygium grows over the cornea, it can interfere with vision. It may cause astigmatism, blurred vision, glare or visual distortion. In advanced cases, the growth may cover part of the pupil area, although this is less common when the condition is monitored and treated appropriately.

Causes and Risk Factors

The exact cause of pterygium is not fully understood, but long-term ultraviolet radiation exposure is considered a major contributing factor. UV light may damage the limbal area, where the cornea and conjunctiva meet, and may trigger abnormal tissue growth and chronic surface inflammation.

Environmental exposure also plays an important role. Wind, dust, sand, dry air and reflected sunlight from water, snow, concrete or sand can irritate the eye surface over time. People who work or spend many hours outdoors may therefore have a higher risk.

Risk factors may include living in sunny climates, outdoor occupations, frequent outdoor sports, limited use of protective eyewear, chronic dry eye and a personal tendency toward eye surface inflammation. Pterygium is more often seen in adults, but prevention habits are useful at any age.

Genetics and individual eye surface health may influence why some people develop pterygium and others do not despite similar sun exposure. A pterygium is not contagious, and it does not spread from one person to another.

Diagnosis

An ophthalmologist can usually diagnose pterygium during a routine eye examination. The doctor examines the eye surface, notes the size and location of the growth, and checks whether it is extending onto the cornea. The appearance and pattern of growth are important for distinguishing it from other eye surface conditions.

A slit-lamp examination, which uses a microscope with a bright light, allows detailed assessment of the conjunctiva, cornea and tear film. Vision testing helps determine whether the pterygium is affecting clarity of sight. If corneal shape has changed, corneal topography or keratometry may be used to measure astigmatism.

In most cases, additional tests are not needed. However, any unusual-looking lesion, rapid growth, bleeding, marked pigmentation or recurrent inflammation may require closer evaluation. The doctor may consider photographs for monitoring or, rarely, laboratory assessment if another diagnosis must be excluded.

Treatment Options

Treatment depends on symptoms, size, growth pattern and impact on vision. A small, quiet pterygium may only need observation and preventive care. Lubricating eye drops or artificial tears can improve dryness and reduce the gritty feeling. The patient should use medications only as recommended by an eye care professional, especially if anti-inflammatory drops are considered.

If the pterygium becomes red and inflamed, the doctor may prescribe short-term treatment to calm irritation. Managing dry eye, allergies or blepharitis can also improve comfort. Protective eyewear is an important part of treatment because ongoing UV and environmental exposure can aggravate the condition.

Surgery may be recommended when a pterygium threatens or affects vision, causes significant astigmatism, repeatedly becomes inflamed, limits eye movement, interferes with contact lens wear or creates a cosmetic concern that the patient wishes to address. Surgery removes the growth and usually includes covering the area with a conjunctival autograft, meaning a small piece of the patient’s own healthy conjunctiva is moved to the affected area.

Modern surgical techniques aim to improve comfort, restore a smoother eye surface and reduce recurrence risk. Even after successful surgery, recurrence is possible, especially if UV exposure continues. Follow-up visits, prescribed post-operative drops and consistent sun protection are essential parts of recovery.

Prevention and Self-care

Prevention focuses on reducing eye surface irritation and UV exposure. People who live in sunny climates or spend time outdoors should protect their eyes every day, not only at the beach or during summer. UV radiation can still reach the eyes on cloudy days and may reflect from water, pavement, sand or snow.

Helpful self-care measures include:

• Wearing wraparound sunglasses that block UVA and UVB rays.
• Using a wide-brimmed hat when outdoors for long periods.
• Avoiding direct exposure to wind, dust and smoke when possible.
• Using preservative-free artificial tears if dryness is frequent.
• Taking breaks during screen use and blinking regularly.
• Following the doctor’s plan after pterygium surgery to reduce inflammation and recurrence risk.

Eye drops marketed for redness relief should not be used regularly without medical advice, because they may mask irritation or cause rebound redness. If the eye feels persistently dry or inflamed, an eye care professional can recommend safer long-term options and check for associated conditions.

When to See a Doctor

A person should schedule an eye examination if a new growth appears on the eye surface, if redness or irritation persists, or if the eye feels gritty despite lubrication. Early assessment helps confirm that the growth is a pterygium and not another condition requiring different care.

Medical attention is especially important if there is blurred vision, increasing astigmatism, rapid growth, pain, light sensitivity, discharge, bleeding or a change in the color or shape of the lesion. People who have had pterygium surgery should also attend follow-up visits and report new redness or regrowth promptly.

For international patients seeking evaluation or treatment, Acibadem International provides access to multidisciplinary eye care specialists and JCI-accredited hospitals. As with any medical decision, the most appropriate approach should be based on an individual examination and discussion with a qualified ophthalmologist.

Frequently asked questions

Is pterygium dangerous?

Pterygium is usually a benign eye surface growth and is not cancer. It can still cause discomfort, redness and vision changes if it grows onto the cornea. An eye examination is recommended to confirm the diagnosis and monitor progression.

Can pterygium go away on its own?

A pterygium usually does not disappear without treatment. Mild symptoms may improve with lubricating drops, inflammation control and UV protection, but the tissue growth often remains. If it grows or affects vision, an ophthalmologist may discuss surgical removal.

What is the difference between pterygium and pinguecula?

A pinguecula is a small yellowish or raised spot on the white part of the eye that does not grow onto the cornea. A pterygium is a wedge-shaped growth that can extend toward or over the cornea. Both are linked to sun, wind and dryness, but treatment decisions depend on symptoms and corneal involvement.

Does pterygium surgery hurt?

Pterygium surgery is typically performed with anesthesia to keep the eye comfortable during the procedure. After surgery, mild soreness, tearing, redness or a foreign-body sensation can occur for a period of time. The doctor provides post-operative drops and instructions to support healing.

Can pterygium come back after surgery?

Yes, pterygium can recur after surgery, although modern grafting techniques help reduce this risk. Recurrence is more likely if the eye remains exposed to strong UV light, wind, dust or chronic inflammation. Wearing UV-protective sunglasses and attending follow-up appointments are important.

What sunglasses are best for preventing pterygium?

Sunglasses should block both UVA and UVB rays and ideally have a wraparound design to reduce light, wind and dust entering from the sides. A wide-brimmed hat adds another layer of protection. People who spend many hours outdoors may benefit from protective eyewear designed for their work or sport.

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.