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Effect of Time Spent Outdoors on Emmetropization Among Chinese Children

Effect of Time Spent Outdoors on Emmetropization Among Chinese Children

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ChiCTR
Registry ID
ChiCTR-IOR-17013868
Enrollment
Unknown
Registered
2017-12-13
Start date
2018-01-01
Completion date
Unknown
Last updated
2017-12-18

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

Conditions

myopia

Interventions

case group:spent 45 minutes in outdoor activities
control group:habital condition

Sponsors

Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University
Lead Sponsor

Eligibility

Sex/Gender
Male
Age
4 Years to 6 Years

Inclusion criteria

Inclusion criteria: 1. Children in mid-class of kindergarden; 2. No strabismus, amblyopia or other ocular diseases; 3. No systemic diseases which may affect the visual development process.

Exclusion criteria

Exclusion criteria: 1. Unable to cooperate in ocular examination; 2. Unwilling to participate in this study; 3. Unable to complete the 2-year follow-up.

Design outcomes

Primary

MeasureTime frame
the year of emmetropization;the change of refraction;the change of axial length;—

Countries

China

Contacts

Public ContactWang Ningli

Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University

wningli@vip.163.com+86 13511026669

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 4, 2026