China Axial Length Reference

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a multicenter, observational cohort of 30,000 children and adolescents in China with baseline cycloplegic eye measurements and annual visits for three years. Investigators will collect axial length and related ocular parameters to map growth trajectories by age. Participants are recruited from several hospitals and must have lived in the study area for at least one year and remain locally available for two more years. The main goal is to produce normative axial length reference ranges to inform clinical care and public health approaches to myopia in Chinese youth.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Aged 3 to 18 years
* Have been lived in the research areas for at least one year, and will not move to other places in the following two years
* Parents or guardians sign an informed consent form, and children over 6 years old need oral consent to participate

Exclusion Criteria:

* Mental diseases, unable to cooperate to complete the eye assessment
* Ophthalmic diseases, inability to cooperate to complete the inspection

Where it's running

• Shanghai Eye Disease Prevention & Treatment Center
  Shanghai, Shanghai Municipality, China Recruiting
• Shanghai Eye Disease Prevention and Treatment Center
  Shanghai, China Recruiting

Study contacts

• Study coordinator: Xun Xu, MD
• Email: drxuxun@sjtu.edu.cn
• Phone: 021-53555032

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.