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Recruiting NCT05770661

China Children Eye Study

— Observational Axial Length Myopia Child Development

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
This is an observational study: the protocol does not assign a study treatment.
Who it may be relevant to
Registry conditions: Axial Length, Myopia, Child Development. Basic parameters: 3 years — 18 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
China
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

Unsure about the terms? Read our patient guide →

Official title

China Nine Provinces Children Eye Study

Overview

The primary objective of this multi-center, observational study is to establish the reference ranges of axial length in Chinese children and adolescents. 30,000 children aged 3-18 years were examined with cycloplegia to collect their ocular parameters and were all followed up for three years with annual visits.

Primary outcome measures

  • Axial length [Time frame: 2023-2026]
Secondary outcome measures (1)
  • Axial length elongation [Time frame: 2023-2026]

Eligibility criteria

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

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Observational model
Cohort

Study locations

China · 2 centers
  • Shanghai Eye Disease Prevention & Treatment Center — Shanghai
  • Shanghai Eye Disease Prevention and Treatment Center — Shanghai

Identifiers

NCT: NCT05770661 · NO.CALS20220101

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗