Pterygium — restoring a healthy ocular surface
A pterygium is a fibrovascular conjunctival growth that gradually spreads onto the cornea, linked to chronic ultraviolet exposure. It particularly affects people exposed to sun, wind and dust — sailors, farmers, outdoor athletes — and can remain symptom-free for a long time before becoming bothersome. Do you have persistent redness or a foreign body sensation, or have you noticed a recent change in your prescription? A pterygium can induce astigmatism and, if it progresses toward the visual axis, affect your vision.
Prevention relies on rigorous sun protection, which is effective in slowing or stabilizing the lesion. When surgery is indicated, I perform a conjunctival autograft with fibrin glue (Tisseel®), the current reference technique, which offers a low recurrence rate — around 5% at 10 years in published series (Daponte 2019).
What is a pterygium? — an invasive fibrovascular tissue
A pterygium is a benign but progressive growth of conjunctival tissue rich in fibroblasts and blood vessels. It usually starts at the inner canthus (the inner corner of the eye, on the nose side) and slowly progresses toward the visual axis. Understanding its origin and mechanisms helps you prevent it and decide on the timing of surgery.
Fibrovascular tissue
A growth of conjunctiva with active fibroblasts and new blood vessels. Slow, progressive growth starting from the corneoscleral limbus. Pigmentation is often present in people with darker skin.
Fibroblast activation
Chronic UV exposure → DNA damage in the conjunctiva → activation of limbal fibroblasts → production of collagen and angiogenic factors → progressive tissue growth.
Progressive symptoms
Redness (vasodilation), gritty sensation, induced astigmatism (if it reaches the axis), reduced vision when advanced.
Progression toward the axis
The rate varies with individual factors and exposure. It may remain stable for years or progress quickly. Encroachment on the visual axis = risk of astigmatism + reduced visual acuity → indication for surgery.
Risk factors — who is affected
Pterygium mainly affects people exposed to the elements. Some factors increase the risk dramatically.
Factors that increase the risk
- Chronic sun exposure without protection (UV, infrared)
- Arid climate, wind, dust (desert, windy coastlines)
- Intensive outdoor activities — sailors, farmers, athletes (skiing, windsurfing, mountain sports)
- Tropical regions — latitudes close to the equator
- Men aged 30–60 (more common in men)
- Chronic dry eye (aggravating factor)
- Prolonged past exposure (even long ago) counts
Warning signs: when to suspect it?
- Whitish-pinkish growth near the nose on the surface of the eye
- Persistent localized redness on the nasal side
- Recent change in prescription — new or increased astigmatism
- Glare discomfort or localized photophobia
- Gritty sensation or chronic irritation
- History of outdoor work or living in an arid climate
- Pterygium in the other eye — risk of both eyes being affected
Preventing pterygium — sun protection is essential
The best weapon against pterygium is prevention. If you have risk factors or an early pterygium, rigorous sun protection can slow or stop its progression.
Preventive measures
- UV400 sunglasses in a wraparound style — they cover the sides near the nose, where pterygium develops
- Cap or wide-brimmed hat — also protects against wind and dust
- Regular artificial tears during prolonged exposure to wind, dust or dry air
- Adequate hydration — prevents associated dry eye
- Avoid midday exposure at altitude, at sea or on snow (UV reflection)
- Yearly check-up if you have an early pterygium → monitoring of progression
Practical tips for outdoor work
- Sailors, farmers, athletes: invest in polarized UV400 lenses
- Beach/mountains: reapply tears every 2–3 hours
- Dry/hot areas: a cap is essential; humidify the surrounding air (spray)
- Children: UV sunglasses from a very young age (early sun protection matters most)
- After surgery: LIFELONG sun protection (just as crucial to prevent recurrence)
Diagnosing pterygium — the clinical approach
The diagnosis is usually straightforward on clinical examination, but several tests complete the assessment to evaluate the functional impact and plan treatment.
Slit lamp
Direct view of the pterygium: size, vascularity, pigmentation, corneal encroachment (measured in mm from the limbus). Checks for associated inflammation.
Surface photography
Documentation at every visit: comparison of size and appearance over time. Crucial if monitoring is chosen rather than immediate surgery.
Corneal topography
If astigmatism is suspected (pterygium can induce it). Precise measurement of corneal curvature → quantifies the induced astigmatism and its axis.
Anterior segment OCT
High-resolution optical imaging of the surface — helps with the differential diagnosis (pterygium vs pinguecula vs dermoid) and assesses tissue thickness.
Conservative medical treatment — when not to operate right away
If the pterygium does not affect vision and remains stable, monitoring and symptomatic treatment are sufficient. Several measures reduce inflammation and slow progression.
Treating the symptoms
- Preservative-free artificial tears — apply 4–6 times a day in case of irritation. Preservatives (BAK) worsen dryness and inflammation
- Short courses of topical anti-inflammatories — NSAIDs (ketorolac eye drops) or mild corticosteroids (fluorometholone) during inflammatory flare-ups (1–2 weeks maximum). Never continuously
- Night-time eye cover — if the eye is red in the morning (night-time dryness makes it worse)
- Topical sunscreen — protect the nose area during intense exposure
Monitoring and timing of surgery
- Visit every 3–6 months once a pterygium is detected (photography + measurement)
- If stable → continued monitoring, no surgery
- If rapidly progressing toward the axis → surgical opinion within 3–6 months
- If the induced astigmatism is bothersome → discuss surgery, even if the axis is not involved
- The patient's role — sun protection, regular tears, self-monitoring of progression
Recovery — the healing process
The first weeks are critical for the graft to take. Here is the expected course and what you will feel.
Immediately after
The eye may be swollen, with mild pain. Protective shield in place. Intensive tears (every 30 min). Complete rest. Residual anesthesia for 2–4h.
Moderate pain for 24–48h
Sensitivity to light (photophobia). Slightly red eye. The shield is usually removed on day 1 after a check-up. Tears every 1–2h. Simple painkillers (paracetamol/acetaminophen, NSAIDs if tolerated) if there is pain.
1-week check-up
Graft integrated, glue absorbed. Slit-lamp examination: appearance of the graft, epithelial healing. Removal of sutures if used (rare, usually glue only). Return to light work.
1 month: well healed
Residual redness, excellent graft appearance. Gradual return to activities (sports, screens). Rigorous sun protection now REALLY begins. Follow-up visit.
Final healing
Graft stabilized. Redness almost back to normal. Stable vision (the astigmatism induced by the pterygium is generally reduced or even gone). Monitoring visit. Refraction if the astigmatism has changed.
Long-term follow-up
Yearly monitoring after a history of pterygium. Follow-up photographs to detect early recurrence (localized redness in the same place, an early growth). Sun protection maintained for life.
Risks and complications — what you need to know
Like any surgical procedure, pterygium surgery carries risks. They are rare overall with the modern technique, but you should be aware of them.
Expected outcomes
- Low recurrence — ~5% at 10 years (Daponte 2019)
- Relief of discomfort — redness and irritation resolve within 1–3 months
- Improved acuity — if induced astigmatism was present beforehand
- Long-lasting result — the graft remains stable permanently
Intraoperative risks
- Subconjunctival hematoma / bruising — resolves within 2–3 weeks
- Corneal perforation — rare with careful dissection, but serious if it occurs
- Infection — prevented by topical antibiotics after surgery
- Poor glue adhesion — may require one or two additional micro-sutures
Post-operative complications
- Recurrence — ≈ 5% at 10 years after autograft + fibrin glue (Daponte 2019). Varies with technique, sun protection and individual factors
- Visible conjunctival scar — residual redness of the graft for 1 to 3 months, then fading
- Conjunctival granuloma — rare, removed surgically if bothersome
- Graft necrosis — very rare, may require a new graft
- Temporary astigmatism — improves within 2–3 months
- Prolonged photophobia — may last 4–6 weeks
- Dellen / symblepharon — very rare (localized corneal thinning or adhesion between eyelid and conjunctiva)
- Resuming contact lenses — postponed for at least 1 month
Preventing recurrence — lifelong sun protection
Recurrence is the main risk. Here are the strategies to minimize it.
Causes of recurrence
- Continued prolonged UV exposure — the main factor
- Incomplete excision of the primary pterygium — active residual fibrovascular tissue
- Genetic / inflammatory predisposition — some patients are more prone
- Untreated dry eye — an aggravating factor to correct beforehand
Prevention strategies
- RIGOROUS lifelong sun protection — wraparound UV400 sunglasses every day outdoors
- Cap/hat at all times in sunny areas or during outdoor work
- Regular artificial tears in case of dryness or wind exposure
- Yearly monitoring — follow-up photos, early detection of recurrence
- Avoid midday exposure at altitude, at sea and in reflective environments
If a recurrence occurs
- Repeat surgery is possible — re-excision + conjunctival autograft, usually reinforced
- Intraoperative mitomycin C — an antifibroblastic agent applied briefly, reserved for recurrences to limit renewed growth
- Amniotic membrane — a useful alternative or addition in complex cases (multiple recurrences, fragile ocular surface, severe dry eye)
- Recurrence after repeat surgery — with autograft + MMC or amniotic membrane, the recurrence rate falls to ≈ 5–20% in modern series (Hirst, Surv Ophthalmol 2003; recent reviews). The high figures of the past (50% and more) concerned bare excisions without a graft
- Bottom line: the quality of the first surgery is decisive, and sun protection remains the best prevention
Do you recognize these symptoms? Start with a consultation
I offer a complete assessment under the microscope to evaluate your pterygium and discuss the best plan together: close monitoring or surgery, depending on your situation.
Book an appointment ↗4 steps in your care — from diagnosis to prevention
Initial consultation
Slit lamp, photographs, astigmatism assessment, tear film. Diagnosis confirmed.
Treatment decision
Monitoring vs surgery depending on discomfort, progression and occupation. Detailed consent if surgery is chosen.
Surgery + recovery
Outpatient autograft + fibrin glue. Intensive tears, protective shield, regular check-ups on day 1, at 1 month and at 3 months.
Lifelong prevention
Rigorous sun protection, yearly photographic follow-up. Monitoring for recurrence and overall eye health.
FAQ — your questions answered
Not immediately, but it can progress and reach the visual axis (the pupil), which induces astigmatism and can reduce vision. That is why regular monitoring is important, and surgery is indicated if vision decreases or if the pterygium progresses toward the axis.
Local anesthesia (eye drops) is more than sufficient because the surface of the eye is not very sensitive, and you remain awake and still during the procedure. It is an outpatient procedure, quick (20–30 min) and very safe. Light sedation can be offered to anxious patients.
After 1–2 weeks, you can gradually resume your activities. At 3–4 weeks, normal activities are possible. However, rigorous sun protection (UV400 sunglasses, cap) should become a lifelong habit after surgery to reduce the risk of recurrence.
Yes, this is the main risk — but it is now low. With a conjunctival autograft secured with fibrin glue (the current reference technique), recurrence is rare: ~5% at 10 years. Older techniques (excision alone) recurred much more often (up to 40%). Lifelong sun protection reduces the risk even further.
A pinguecula is a lipid and collagen deposit on the conjunctiva, often yellowish, but it does not extend beyond the limbus (the corneoscleral junction) and never grows onto the cornea. A pterygium, on the other hand, is fibrovascular tissue that crosses the limbus and spreads over the cornea. Only a pterygium can truly affect vision in the long run.
Generally not. I first operate on the eye that is most bothersome. The second eye, if it needs surgery, can be operated on a few weeks or months later. This makes it possible to monitor healing of the first eye and adapt the technique for the second eye if necessary.
Yes, when it is medically indicated (visual impairment, rapid progression, chronic inflammation). A quote is provided before the procedure so you can anticipate any extra fees, depending on your complementary health insurance (mutuelle).
Good-quality sunglasses (wraparound with a UV400 filter) significantly reduce the risk, but are not enough on their own. A cap or wide-brimmed hat, limiting exposure to the midday sun at altitude or by the sea, and artificial tears during prolonged outdoor work are also important. Prevention works on several levels.
Bothered by it every day? Let's take stock
I offer a complete assessment of your ocular surface and a detailed discussion of the options: monitoring and sun protection if the pterygium is stable, or surgery with conjunctival autograft + fibrin glue if its progression or your discomfort justify it.
Related pages — learn more
Scientific references
This page is based on clinical data and reference publications in ocular surface ophthalmology. All sources can be verified.
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1
Daponte PL, Cigna A, Barboni P, et al. Conjunctival Autograft With Fibrin Glue for Pterygium: A Long Term Recurrence Assessment. Med Hypothesis Discov Innov Ophthalmol. 2019;8(4):272-277.
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2
Maiti R, Mukherjee S, Hota D. Recurrence Rate and Graft Stability With Fibrin Glue Compared With Suture for Conjunctival Autograft Adherence in Pterygium Surgery: A Meta-Analysis. Cornea. 2017;36(10):1285-1294.
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3
Hirst LW. The treatment of pterygium. Surv Ophthalmol. 2003;48(2):145-180.
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4
Coroneo MT. Pterygium as an early indicator of ultraviolet insolation. Br J Ophthalmol. 1993;77(11):734-739.
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5
McMonnies CW. Eye rubbing and pterygium. Cont Lens Anterior Eye. 2017;40(1):1-7.
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6
Liu L, Wu J, Geng J, Yuan Z, Huang D. Geographical prevalence and risk factors for pterygium: a systematic review and meta-analysis. BMJ Open. 2013;3(11):e003787.
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7
American Academy of Ophthalmology. Preferred Practice Pattern (PPP) — Conjunctivitis and Ocular Surface Disorders. aao.org
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8
Rezvan F, Khabazkhoob M, Hooshmand E, Yekta A, Saatchi M, Hashemi H. Prevalence and risk factors of pterygium: a systematic review and meta-analysis. Surv Ophthalmol. 2018;63(5):719-735.
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9
Threlfall TJ, English DR. Sun exposure and pterygium of the eye: a dose-response curve. Am J Ophthalmol. 1999;128(3):280-287.
The content of this website is for information purposes only and does not replace a medical consultation. Any treatment decision should be made together with your ophthalmologist.