Pterygium

The main cause of pterygium is prolonged, cumulative exposure to UV rays from the sun, which damages your eye's surface over time. Other major factors include living in dry, windy, or dusty areas, as these conditions constantly irritate your eyes and can promote abnormal tissue growth. People who work or spend a lot of time outdoors without proper eye protection face the highest risk of developing this condition.

People living in the 'pterygium belt,' which is within 30 to 40 degrees of the equator, have much higher rates of the condition due to intense, year-round sun exposure. In these regions, pterygium can affect 2% to 30% of the population. Coastal areas with strong winds and reflected sunlight from water, sand, or snow also increase risk. Those who work outdoors, such as farmers, construction workers, fishermen, and surfers, develop pterygium more often than people who work indoors.

Men tend to get pterygium more often than women, possibly due to higher rates of outdoor work and less consistent use of sun protection. It most commonly appears in adults between 20 and 50 years old, though it can develop at any age with enough sun exposure. People with light-colored eyes may be slightly more susceptible. While a family history can play a small role, environmental factors are the main cause of pterygium.

Using preservative-free artificial tears several times a day keeps your eyes moist and reduces the gritty, scratchy feeling. Avoid rubbing your eyes, as this causes more irritation. Applying a cool, damp cloth over closed eyes for a few minutes can also provide soothing relief. If you smoke, quitting is strongly encouraged, as smoking can worsen eye surface irritation and inflammation.

If you work outdoors, wear wraparound safety or sunglasses to protect your eyes from wind, dust, and UV light. Taking regular breaks in shaded or indoor areas can also help reduce exposure. At home or in the office, using a humidifier can combat dry air that worsens symptoms. When doing activities like gardening or cleaning, wear protective eyewear to shield your eyes from debris and irritants.

If pterygium affects your vision, ensure you have adequate lighting when reading or doing close-up work to reduce eye strain. Keep your glasses or contact lens prescription up to date, as the growth can gradually change your vision needs. If glare from lights makes driving at night difficult, we encourage you to discuss treatment options with our team promptly to address these vision concerns.

No, a pterygium is a completely benign growth and is not cancerous. It will not spread to other parts of your body. However, because very rare cancerous growths on the eye can sometimes look similar to a pterygium, it is essential to have any new or changing growth evaluated by our eye care team to ensure a correct diagnosis.

A pterygium will not go away on its own once it has formed. Without surgical removal, it will either remain stable or continue to grow slowly. Many small, stable pterygia that do not cause symptoms can be managed with protective measures and lubricating drops without needing surgery.

Recurrence rates depend heavily on the surgical technique used. With modern surgery that uses a tissue graft, the recurrence rate is low, around 5% to 10%. Older techniques that left the area bare had much higher recurrence rates of up to 40% or more. Strictly following post-operative instructions, especially regarding eye drops and sun protection, is critical to preventing regrowth.

A pinguecula is a yellowish, slightly raised bump that forms on the white part of your eye but does not grow onto the cornea. A pterygium is a fleshy, vascular growth that does cross from the white part onto your cornea and can therefore affect vision. Both are caused by similar environmental factors, but a pterygium is considered more serious due to its potential to impact your sight.

Yes, it is common for pterygium to develop in both eyes (called bilateral pterygium), especially in people with high levels of sun exposure. The growths may appear at different times and grow at different rates. Even if only one eye shows signs, both eyes share the same risk factors and should be protected and monitored during regular eye exams.

Many patients with small pterygia can wear contact lenses, but they may experience increased dryness or irritation. The raised growth can also affect the way the lens fits on your eye. Soft lenses are often better tolerated than rigid ones. If you experience discomfort, our team may recommend specific lens types, more frequent lubrication, or switching to glasses temporarily or permanently.

Most patients can return to non-strenuous daily activities within a few days, but your eye will be red, scratchy, and may tear excessively for the first 1 to 2 weeks. Vision may be blurry initially but typically improves within the first month. Complete healing, where your eye returns to a normal white appearance, can take 3 to 6 months.

No, treatment is only necessary when the pterygium causes persistent irritation not relieved by drops, begins to affect vision by causing astigmatism or growing near your pupil, or is a cosmetic concern. Many small, stable pterygia only require regular monitoring during routine eye exams with our ophthalmologists.

Pterygium is very rare in children but can occur, especially in regions with intense sun exposure. Because the condition develops from cumulative UV damage over many years, it is far more common in adults. Protecting children's eyes with sunglasses and hats from a young age is the best way to prevent it from forming later in life.

While it rarely causes complete blindness, a pterygium can lead to permanent vision impairment if it is allowed to grow unchecked. If it covers the central visual axis or causes significant corneal scarring before it is removed, some vision changes may persist even after surgery. This is why timely treatment is important if the pterygium is progressing toward your pupil or causing visual symptoms.

While some studies suggest a minor genetic predisposition, environmental factors are overwhelmingly the primary cause of pterygium. The most significant risk is not what you inherit, but where you live and how much UV exposure your eyes receive over your lifetime. Having a family member with a pterygium might indicate a shared high-exposure environment or lifestyle rather than a direct genetic link.

The cost of pterygium surgery varies widely based on geographic location, surgical fees, the facility, and your health insurance coverage. When surgery is deemed medically necessary (to preserve or restore vision), it is typically covered by insurance. If the procedure is done for purely cosmetic reasons, it is usually not covered. We recommend contacting our office and your insurance provider for specific cost information.

No specific vitamin or supplement has been proven to cure or shrink a pterygium. However, nutrients that support overall eye surface health, such as omega-3 fatty acids, can help manage the dryness and irritation associated with the condition. A balanced diet and good hydration support overall eye health but are not a substitute for medical treatment or proper eye protection.

Yes, by inducing astigmatism and distorting your cornea, a pterygium can affect the clarity of your vision, which can in turn impact depth perception. It can also cause increased glare and halos around lights, which is especially noticeable and disruptive when driving at night. Surgical removal can often improve or resolve these symptoms and restore clearer vision.

Surgery remains the only definitive way to remove a pterygium. However, research is ongoing into new therapies. Some studies are exploring medications that could inhibit the growth factors that cause pterygia, potentially reducing the need for surgery or preventing recurrence. At present, these approaches are still experimental and not available for general use.