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The Evolutionary Model of Mild-to-moderate Myopia in China

Sponsor
Sun Yat-sen University (Other)
Overall Status
Completed
CT.gov ID
NCT02667509
Collaborator
Ministry of Health, China (Other)
852,441
Enrollment
1
Location
129
Duration (Months)
6610.5
Patients Per Site Per Month

Study Details

Study Description

Brief Summary

Myopia has emerged as a major health issue in east Asia, because of its increasingly high prevalence in the past few decades (now 80-90% in school-leavers), and because of the sight-threatening pathologies associated with high myopia, which now aff ects 10-20% of those completing secondary schooling in this part of the world. Similar, but less marked, changes are occurring in other parts of the world. The higher prevalence of myopia in east Asian cities seems to be associated with increasing educational pressures, combined with life-style changes, which have reduced the time children spend outside.

Condition or Disease Intervention/Treatment Phase

    Detailed Description

    Myopia has emerged as a major health issue in east Asia, because of its increasingly high prevalence in the past few decades (now 80-90% in school-leavers), and because of the sight-threatening pathologies associated with high myopia, which now aff ects 10-20% of those completing secondary schooling in this part of the world. Similar, but less marked, changes are occurring in other parts of the world. The higher prevalence of myopia in east Asian cities seems to be associated with increasing educational pressures, combined with life-style changes, which have reduced the time children spend outside.

    In this trial, the investigators aim to study the evolutionary model of myopia in China, which could provide new insight into the social development and human adaptation.

    Study Design

    Study Type:
    Observational
    Actual Enrollment :
    852441 participants
    Time Perspective:
    Cross-Sectional
    Official Title:
    The Evolutionary Model of Mild-to-moderate Myopia in China
    Study Start Date :
    Jan 1, 2005
    Actual Primary Completion Date :
    Oct 1, 2015
    Actual Study Completion Date :
    Oct 1, 2015

    Outcome Measures

    Primary Outcome Measures

    1. Refractive error of both eyes measured by autorefractor and subjective measuring [Baseline]

    Eligibility Criteria

    Criteria

    Ages Eligible for Study:
    N/A and Older
    Sexes Eligible for Study:
    All
    Accepts Healthy Volunteers:
    Yes
    Inclusion Criteria:
    • Patients complete the examination of Refractive error from 2005 to 2015 year.
    Exclusion Criteria:
    • Patients could not complete the examination of Refractive error

    Contacts and Locations

    Locations

    Site City State Country Postal Code
    1 Zhongshan Ophthalmic Center, Sun Yat-sen University Guangzhou Guangdong China 510060

    Sponsors and Collaborators

    • Sun Yat-sen University
    • Ministry of Health, China

    Investigators

    • Study Director: Haotian Lin Lin, M.D., Ph.D, Zhongshan Ophthalmic Center, Sun Yat-sen University
    • Study Chair: Yizhi Liu, M.D., Ph.D, Zhongshan Ophthalmic Center, Sun Yat-sen University
    • Principal Investigator: Erping Long, M.D., Ph.D, Zhongshan Ophthalmic Center, Sun Yat-sen University

    Study Documents (Full-Text)

    None provided.

    More Information

    Additional Information:

    Publications

    Responsible Party:
    Erping Long, Principal Investigator, Home for Cataract Children, Zhongshan Ophthalmic Center, Sun Yat-sen University
    ClinicalTrials.gov Identifier:
    NCT02667509
    Other Study ID Numbers:
    • CCPMOH2016-China2
    First Posted:
    Jan 29, 2016
    Last Update Posted:
    Apr 14, 2016
    Last Verified:
    Apr 1, 2016
    Keywords provided by Erping Long, Principal Investigator, Home for Cataract Children, Zhongshan Ophthalmic Center, Sun Yat-sen University
    Evolutionary Model
    Additional relevant MeSH terms:
    Refractive Errors

    Study Results

    No Results Posted as of Apr 14, 2016