Environmental Health and Myopia Prevention and Control

• Conditions: Refractive Errors; Myopia (Disorder)

• Registration Number: NCT04161326
• Lead Sponsor: Sun Yat-sen University

Brief Summary

Myopia is one of the major causes of low visual acuity during childhood. It is generally more prevalent in urban areas than in rural areas. Current evidence does not address our understanding of the myopia incidence and development and associated risk geographic factors, such as green spaces. Therefore, our study aimed to evaluate the association between geographic factors and myopia base on a population-based large-scaled cohort design.

Detailed Description

Not available

Study Timeline

• Study Start: 2016-01-01
• Study First Submitted: 2019-11-11
• Study First Submitted QC: 2019-11-11
• Study First Posted: 2019-11-13
• Primary Completion: 2019-12-30
• Status Verified: 2020-02
• Last Update Submitted: 2020-02-22
• Last Update Posted: 2020-02-25
• Study Completion: 2021-12-30

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 100000

Inclusion Criteria

• schoolchildren in the 1st to 4th grades

Exclusion Criteria

• schoolchildren unwilling to participate

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
the changes of spherical equivalent refractive (RSE)	up to 3 years	A multi-linear regression was used.

Trial Locations

Locations (1)

Zhongshan Ophthalmic Center, Sun Yat-sen University; 🇨🇳 Guangzhou, Guangdong, China