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.
Privacy and on-device data
This app may store type size, appearance (light / dark / system), saved topics, Amsler notes and outdoor time in localStorage on this device. Nothing is uploaded to a server. No name or ID is required. Clearing the site data in the browser deletes it. Adding to the Home Screen is an on-device prompt, not an account.
Personal Data (Privacy) Ordinance (Cap. 486)
This education site does not collect names, ID numbers, medical records, phone numbers or payment data through this page. There is no account and no server-side medical Q&A log. This site uses Vercel's cookie-free anonymous visit statistics (pages and referrers only). It does not use Google Analytics or advertising trackers and does not store personally identifiable data. The page may load Google Fonts. Type size, appearance, bookmarks, Amsler notes and outdoor time stay in on-device localStorage only and are not uploaded. Use “Clear local data” below or clear site data in the browser to delete local records.
There is no account. This site does not collect ID numbers, medical records or payment data. Do not send sensitive personal data — there is no form for that. Tools such as the questions checklist stay on your device and are not uploaded.
Clear local data
Clears on-device preferences in localStorage (type size, appearance, language, bookmarks, Amsler notes, outdoor time). Nothing is uploaded. For corrections, see the legal page; email hokusaivision@gmail.com (For content corrections/suggestions only — not for bookings, clinical advice, or referrals.). This site does not take medical records or bookings here.