Pterygium: Causes, Symptoms, and Treatment Options
If you’ve noticed a small, fleshy, pink-colored growth on the white part of your eye, you might be looking at a pterygium (pronounced "tuh-RIJ-ee-um"). Often nicknamed "surfer's eye," this common eye condition is generally non-cancerous and usually grows slowly. However, it can eventually cause discomfort, vision problems, and cosmetic concerns. Understanding what a pterygium is, why it occurs, and how it is treated is the first step toward managing this condition.
What is a Pterygium?
A pterygium is a triangular-shaped growth of tissue on the conjunctiva (the clear membrane that covers the white part of your eye) that typically starts on the side closest to your nose and extends toward the cornea (the clear front window of the eye).
It is a funny-looking name that references the resemblance of an insect wing, the name having the same Latin root as pterodactyl, the winged dinosaur.
While it may look alarming, it's essentially a thickened area of normal tissue. The most common location for it to form is on the side of the nose, but it can also form on the outer side of the eye.
The key difference between a pterygium and a pinguecula is their location and growth pattern. A pinguecula is a yellowish patch or bump on the conjunctiva that does not grow onto the cornea, whereas a pterygium does grow onto the cornea.
Causes and Risk Factors
While the exact cause of pterygium is not fully understood, it is strongly linked to prolonged exposure to certain environmental factors. The primary risk factors include:
- UV Light Exposure: The most significant factor. People who spend a lot of time outdoors in sunny climates, especially near the equator, are at a much higher risk. This is why it earned the moniker "surfer's eye."
- Dry Eyes: Chronic dryness and irritation of the eye surface may contribute to the development or progression of a pterygium.
- Exposure to Irritants: Exposure to wind, dust, sand, and other environmental irritants can increase the risk.
Recognising the Symptoms
In its early stages, a pterygium may not cause any noticeable symptoms. As it progresses, the following symptoms may occur:
- Appearance: A visible, pink or reddish, wedge-shaped growth on the white of the eye that creeps onto the cornea.
- Irritation: A gritty feeling, burning, or itching sensation, as if there is something in the eye.
- Redness and Inflammation: The lesion may become red, swollen, and inflamed, especially after exposure to sun or wind.
- Dryness: The pterygium can interfere with the normal tear film, leading to dry eyes.
- Blurred Vision: If the growth extends far enough to cover the central cornea or causes significant changes to the corneal shape (a type of astigmatism), it can impair vision.
Treatment Options
The treatment approach for a pterygium depends on its size, the severity of the symptoms, and its impact on vision.
Non-Surgical Management
For mild cases that cause irritation but do not affect vision, the following are often recommended:
- Lubricating Eye Drops and Ointments: Over-the-counter or prescription artificial tears can help reduce dryness, irritation, and redness.
- Steroid Eye Drops: During periods of significant inflammation and swelling, your eye care professional may prescribe a short course of mild steroid drops to control the redness.
- Prevention: The single most important way to manage pterygium is to prevent its progression. Always wear sunglasses outdoors, even on cloudy days, that offer 100% UV protection and have a wraparound style to block light from the sides. Also, wearing protective eyewear in dusty or windy environments is helpful.
Surgical Intervention
Surgery is typically reserved for cases where:
- The pterygium is causing decreased vision or astigmatism.
- The growth is large enough to cause severe, persistent discomfort or chronic inflammation.
- The appearance is a major cosmetic concern for the patient.
The surgery to remove a pterygium is an outpatient procedure. Modern surgical techniques often involve an auto-graft (transplanting a piece of the patient’s own healthy conjunctiva tissue) or using a synthetic graft after removal to help prevent recurrence.
Schedule a Check-up
If you suspect you have a pterygium or a pinguecula, it is important to consult with an eye care professional for an accurate diagnosis and to discuss the best management plan for you. Early intervention, particularly with preventative measures, can help maintain your long-term eye health.