What Is a Pterygium? Causes, Symptoms and Treatment
- Arthur Okonkwo
- 5 min read
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What Causes a Pterygium?
The exact cause of a pterygium is not fully understood, but prolonged exposure to ultraviolet (UV) light is widely considered the most significant risk factor. It is more commonly seen in people who spend a great deal of time outdoors, particularly in sunny or windy environments. According to the NHS, conditions affecting the surface of the eye are often linked to environmental factors and lifestyle.
Common risk factors associated with pterygium development include:
Prolonged exposure to sunlight and UV radiation
Living or working in dry, dusty, or windy environments
Frequent exposure to sand, wind, or smoke
A history of chronic dry eye
Spending significant time outdoors without adequate eye protection
Pterygium is more prevalent in people who live closer to the equator, though it can affect individuals in the UK as well, particularly those with significant outdoor exposure over many years.
What Are the Symptoms of a Pterygium?
In its early stages, a pterygium may cause no noticeable symptoms at all. As it grows, however, it can begin to affect comfort and, in some cases, vision. Symptoms vary depending on the size and progression of the growth.
Common symptoms associated with a pterygium include:
A visible pink or fleshy growth on the white of the eye, extending towards the cornea
Redness or inflammation of the affected area
A persistent gritty, itchy, or burning sensation in the eye
Dryness or a feeling that something is in the eye
Blurred or distorted vision if the growth encroaches on the central cornea
Increased sensitivity to light or wind
It is important to note that not all pterygia progress to the point of affecting vision. However, if you notice any changes to the surface of your eye or experience persistent discomfort, it is advisable to seek an assessment from a qualified ophthalmologist.
How Is a Pterygium Diagnosed?
A pterygium is typically diagnosed through a slit-lamp examination — a specialised microscope used to examine the structures of the eye in detail. During a consultation, Mr Arthur Okonkwo will assess the size, location, and extent of the growth, as well as its impact on the corneal surface and your overall vision. Advanced imaging technology may also be used to evaluate any changes to the cornea caused by the pterygium.
Early diagnosis is important, as monitoring the growth over time allows for timely intervention if the pterygium begins to affect vision or cause significant discomfort.
What Are the Treatment Options for a Pterygium?
Treatment for a pterygium depends on its size, rate of growth, and the symptoms it is causing. Not every pterygium requires surgery, and many cases can be managed conservatively in the first instance.
Non-Surgical Management
For smaller or less symptomatic pterygia, non-surgical approaches may be recommended to manage discomfort and reduce inflammation. These can include:
Lubricating eye drops to relieve dryness and irritation
Anti-inflammatory eye drops to reduce redness and swelling
Wearing UV-protective sunglasses to slow progression
Regular monitoring to track any changes in size or vision
Surgical Treatment: Pterygium Excision with Conjunctival Autograft
Can a Pterygium Be Prevented?
While there is no guaranteed way to prevent a pterygium from developing, reducing exposure to the key risk factors may help lower the likelihood of one forming or progressing. Practical steps include wearing sunglasses, using a wide-brimmed hat in sunny conditions, and protecting your eyes in dusty or windy environments. Managing dry eye symptoms with appropriate lubrication may also be beneficial.
When Should You See a Specialist?
You should consider seeking a specialist opinion if you notice a visible growth on the surface of your eye, experience persistent redness or irritation that does not resolve, or if your vision appears to be changing. Early assessment allows for appropriate monitoring and, where necessary, timely treatment to protect your long-term eye health.
If you experience sudden changes in vision, significant eye pain, or any other urgent symptoms, please seek immediate medical attention.
Understanding Your Eye Health in Leeds
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About Arthur Okonkwo
Mr. Okonkwo is a dual fellowship-trained ophthalmologist with extensive experience in corneal disease, cataract surgery, and advanced vision correction procedures.