What is a pterygium?
A pterygium (pronounced te-RIJ-ee-um) is a wedge of conjunctival tissue — the membrane covering the white of the eye — that grows slowly onto the cornea. It is not cancer and does not spread inside the eye. Long-term ultraviolet light exposure, dust, wind and dryness are the usual drivers, which is why it is common among people who spend much time outdoors.
It typically starts at the inner corner of the eye (the nasal side) and grows centripetally across the cornea over years. A related, smaller lesion called a pinguecula stays on the white of the eye without crossing onto the cornea.
Symptoms and when it matters
Many pterygia cause no trouble beyond a cosmetic concern or mild redness. Others cause foreign-body sensation, recurrent inflammation, grittiness, or — as they encroach on the visual axis — induced astigmatism and blurred vision. Indications for removal generally include growth toward the pupil area, significant distortion of vision, persistent irritation not relieved by lubricants, restriction of eye movement, or cosmetic concern after informed discussion.
Conservative care first
Unless one of the surgical indications applies, management is conservative: UV-protective wraparound sunglasses outdoors, lubricating drops for comfort, and short anti-inflammatory courses for flare-ups when prescribed. Not every pterygium needs an operation, and the decision balances symptoms, vision effects and the patient’s priorities.
Surgery, when indicated
Modern pterygium surgery removes the growth and covers the bare area with a conjunctival autograft — tissue taken from the patient’s own upper eyelid area — secured with fine sutures or tissue adhesive. The graft markedly lowers recurrence compared with simple excision alone, which is why excision-without-graft is now discouraged. Surgery is usually performed under local anaesthesia as a day procedure, commonly under an hour. Post-operative drops and follow-up visits support healing over several weeks; the grafted surface settles and redness fades gradually.
Recurrence and follow-up
Recurrence is the main long-term concern; graft technique has reduced it substantially, but no technique makes it zero. Continued UV protection after surgery is part of preventing regrowth. Follow-up checks confirm graft healing and watch for early recurrence, which is easier to manage when caught early.