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.

Procedure teaching illustration

A schematic illustration of four procedures. Not a simulator, not a test, and not an operative guide.

This cannot replace a registered doctor. It does not diagnose, prescribe, book, sell, or refer.

Site last reviewed: 6 October 2026 · Dr Poon Ka Kin · Ophthalmologist（Registered doctor, Medical Council of Hong Kong; Specialist Register (Ophthalmology)）

Site version：1.85

If translations differ or are incomplete, the Traditional Chinese (zh-Hant) text on this site prevails.

Publisher / operator: 護眼學堂 (eyesinfo.org). Clinical review: Dr Poon Ka Kin (registered doctor, Medical Council of Hong Kong; Specialist Register (Ophthalmology)). This education site does not provide clinic contact, booking or referral, and does not link to a practice website. This education site currently has no commercial sponsorship; if funding or conflicts of interest arise later, they will be disclosed on the legal page. Education content is shown separately from any clinic promotion; the reviewer may also practise clinically — this site does not refer.

Law and professional code · Privacy and on-device data · Accessibility statement · Further reading

This content cannot replace an in-person consultation with a registered ophthalmologist and is not a diagnosis. This page is not diagnostic, prescribing or surgical advice. Only doctors listed on the Medical Council specialist register in ophthalmology may use the title “ophthalmologist” (眼科專科醫生).

Law and professional code