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.

Education tools

Diagrams and practice steps. No fees, bookings or products. Diagrams and practice cannot replace an in-person visit, a dilated fundus exam or any test, and are not a diagnosis. This site does not offer booking, prescriptions, sales or referrals, and does not link to any practice website.

Amsler gridEducation tool · self-awareness of central vision · Cover one eye · centre Lens vision demoMonofocal target and multifocal halos · Far vs near IOL 3D optics studioParaxial rays, axial length and toric correction (not a clinical power calculator) · See how rays focus in 3D Eye mapEducation tool · self-awareness of eye parts · Tap the diagram Procedure teaching illustrationCataract surgery, retinal detachment, intravitreal injection, chalazion (not a test) · Illustration, not an operative guide Drop techniqueEducation tool · practice steps (not diagnosis) · Follow the steps Questions for your doctorEducation tool · prepare for your visit · Ask before you decide Glaucoma visual-field illustrationMild to end-stage field loss (not a test) · Pick a stage Cataract day and nightFade, haze, headlight glare · Night driving blur Floaters vs curtainDrifting specks vs a fixed shadow · Curtain → A&E; new floaters → same-day dilated exam (dilation alone is not enough)Night halo comparisonMonofocal, EDOF, trifocal demo · Not a surgical promise Warm compress timerA timer for illustration — follow your doctor · Time the compress A clinic visitDo not drive yourself after dilation · What happens at the visit Children’s outdoor timeOutdoor daylight log (public-health round number) · Go out in daylight Reading a glasses prescriptionSph, Cyl, Axis, Add · What the slip means

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.

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