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

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

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT02667509
Enrollment
852441
Registered
2016-01-29
Start date
2005-01-31
Completion date
2015-10-31
Last updated
2016-04-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Refractive Error

Keywords

Evolutionary Model

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 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.

Interventions

None listed

Sponsors

Ministry of Health, China
CollaboratorOTHER_GOV
Sun Yat-sen University
Lead SponsorOTHER

Study design

Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
ALL
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

Design outcomes

Primary

MeasureTime frame
Refractive error of both eyes measured by autorefractor and subjective measuringBaseline

Countries

China

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026