Clinical Trial: The Evolutionary Model of Mild-to-moderate Myopia in China

Study Status: Completed
Recruit Status: Completed
Study Type: Observational

Official Title: The Evolutionary Model of Mild-to-moderate Myopia in China

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.

Detailed 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.

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.

Sponsor: Sun Yat-sen University

Current Primary Outcome: Refractive error of both eyes measured by autorefractor and subjective measuring [ Time Frame: Baseline ]

Original Primary Outcome: Refractive error of both eyes measured by autorefractor and subjective measuring [ Time Frame: First time coming to the center of Optometry for eye examination ]

Current Secondary Outcome:

Original Secondary Outcome:

Information By: Sun Yat-sen University

Dates:
Date Received: January 24, 2016
Date Started: January 2005
Date Completion:
Last Updated: April 12, 2016
Last Verified: April 2016