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OpenTrials
Completed

NCT Number: NCT02667509

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

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.

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Key information

Conditions

Refractive Error Eye Diseases Refractive Errors

Sex eligibility

All sexes

Study type

Observational

Primary location

Zhongshan Ophthalmic Center, Sun Yat-sen University

Guangzhou, Guangdong, 510060, China

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Primary outcomes

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

    Time frame: Baseline

Sponsors and collaborators

Lead sponsor

Sun Yat-sen University

Other

Collaborators

  • Ministry of Health, China

Registry information

Important dates

Study start
2005
Primary completion
2015
Study completion
2015
First posted
Jan 29, 2016
Registry last updated
Apr 14, 2016

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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