Primary angle-closure glaucoma (PACG) is one of the major causes of blindness affecting more than 20 million patients worldwide. The goals of this observational cohort study are to investigate the 20-year incidence of PACG in Chinese population aged 50 years and to develop prediction models for the long-term risk of progression from primary angle-closure suspect (PACS) to PACG.
Who can participate
Age range
70 Years – 100 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Participants who have previously participated in the Liwan Eye Study
* Individuals who sign an informed consent form voluntarily
Exclusion Criteria:
* None
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1This study is tracking the 20-year incidence of primary angle-closure glaucoma in Chinese adults over 50 — given my background and age, does my personal risk profile make it worth discussing whether I should be monitored this closely over time?
2Since this appears to be a long-term observational follow-up study rather than a treatment trial, what would actually be expected of me as a participant — regular eye exams, imaging, or something else — and how would that fit into my existing care schedule?
3The recruitment status for this study is listed as unknown, so can you find out whether it is still actively enrolling or if there are similar long-term glaucoma studies I could participate in instead?
4Because this is a population observation study and not a Phase 1, 2, or 3 treatment trial, does joining it mean I would still have access to all standard treatments for angle-closure glaucoma if my condition progresses?
5Given that this study is specifically focused on Chinese adults over 50, is there anything about my own ethnic background or age that my doctor thinks makes primary angle-closure glaucoma a particular concern I should be screening for regardless of this trial?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
The 20-year incidence of primary angle-closure glaucoma (PACG) in Chinese population aged over 50 years
Timeframe: 20-year
Trial details
NCT IDNCT06333470
SponsorZhongshan Ophthalmic Center, Sun Yat-sen University