China Axial Length Study

Not yet recruiting

• Conditions: Axial Length, Children, China

• Registration Number: NCT05770661
• Lead Sponsor: Shanghai Eye Disease Prevention and Treatment Center

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Status Verified: 2023-03
• Study First Submitted: 2023-03-05
• Study First Submitted QC: 2023-03-05
• Last Update Submitted: 2023-03-05
• Study Start: 2023-03-10
• Study First Posted: 2023-03-15
• Last Update Posted: 2023-03-15
• Primary Completion: 2023-06-30
• Study Completion: 2025-06-30

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 30000

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

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Exclusion Criteria

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

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Axial length	2023-2025	Axial length was examined by IOL Master

Secondary Outcome Measures

Name	Time	Method
Axial length elongation	2023-2025	The elongation was the difference between two annual visits.

Trial Locations

Locations (1)

Shanghai Eye Disease Prevention & Treatment Center; 🇨🇳 Shanghai, Shanghai, China