Refractive Errors Clinical Trial
Official title:
Environmental Health and Myopia Prevention and Control: A Longitudinal Study in China
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.
| Status | Recruiting |
| Enrollment | 100000 |
| Est. completion date | December 30, 2021 |
| Est. primary completion date | December 30, 2019 |
| Accepts healthy volunteers | Accepts Healthy Volunteers |
| Gender | All |
| Age group | 6 Years to 9 Years |
| Eligibility |
Inclusion Criteria: - schoolchildren in the 1st to 4th grades Exclusion Criteria: - schoolchildren unwilling to participate |
| Country | Name | City | State |
|---|---|---|---|
| China | Zhongshan Ophthalmic Center, Sun Yat-sen University | Guangzhou | Guangdong |
| Lead Sponsor | Collaborator |
|---|---|
| Sun Yat-sen University |
China,
| Type | Measure | Description | Time frame | Safety issue |
|---|---|---|---|---|
| Primary | the changes of spherical equivalent refractive (RSE) | A multi-linear regression was used. | up to 3 years |
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