This site provides general eye-health education. It cannot replace individual assessment by a registered doctor, and does not offer personal diagnosis, prescriptions, bookings, sales or referrals.
If translations differ or are incomplete, the Traditional Chinese (zh-Hant) text on this site prevails.
Cornea and ocular surface · 10
Pterygium
A triangular growth on the white · protect from UV
Last reviewed: 2026-10-06 · 潘家健醫生
Key points
A pterygium is conjunctival tissue growing onto the cornea, often nasal, linked with long-term UV and wind/dust.
It can cause foreign-body sensation and astigmatism; larger ones may cover the pupil.
Sun protection and reducing chronic UV exposure are the education focus (not a product pitch).
Surgery is decided after examination and symptoms; this page does not compare clinics.
What it is
A fibrovascular growth onto the cornea, linked to UV. Hats and sunglasses are lifestyle measures, not a shop.
What a doctor may discuss
Lubricants for irritation
Surgery if it threatens the visual axis, induces astigmatism, or keeps inflaming
It can come back; this page does not quote success rates
This is general medical information, not a diagnosis, and cannot replace an in-person consultation with a registered ophthalmologist, refraction, or a dilated fundus exam. It is not advice to use any medicine or undergo any procedure. Medicines (including off-label use), laser or surgery must be decided by a registered doctor after examination, according to indications and Hong Kong registration. Figures from the literature are published averages, not any clinic’s results. This site does not book, prescribe or refer. Do not change treatment on your own.
