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Enrolling by invitationNCT07119723Updated Aug 13, 2025

Environmental Factors and Myopia Prevalence Among Uyghur Students in Remote China

An observational study in Myopia and Environment, sponsored by Tianjin Medical University Eye Hospital. Enrolling by invitation at 1 site in China. Open to participants aged 6 Years to 15 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-13.

Sponsored by Tianjin Medical University Eye Hospital · Observational

Study type
Observational
Model
Cohort
Time perspective
Cross-sectional
Enrollment
100,000
Ages
6 Years to 15 Years
Sex
All
01

Study summary

Ophthalmologic screening performs annually. Main information collected: gender, age, race, school, visual acuity, autorefractive results.

02

Conditions studied

  • Myopia
  • Environment

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03

In context

Myopia

1,159 studies on the registry are indexed under Myopia; 225 are open to participants now.

This study's planned enrollment of 100,000 is above the median of 150 across 204 observational studies indexed under Myopia.

Browse Myopia studies →

Lead sponsor

Tianjin Medical University Eye Hospital is the lead sponsor of 18 studies on the registry; 7 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
6 Years to 15 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Probability sample

Study population

Students aged 6-15 years without strabismus, amblyopia, or other ocular diseases.

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • 6 -15 years old

Exclusion criteria

Exclusion Criteria:

  • Students with strabismus, amblyopia, or other ocular diseases.
05

Study design

Observational model
Cohort
Time perspective
Cross-sectional
Enrollment
100,000 participants (estimated)
Target follow-up
4 Years
Patient registry
Yes
06

What researchers measure

Primary outcomes

  1. spherical equivalent refraction

    Time frame: From January 2020 to December 2026

07

Study locations

1 site
08

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Jun 2020 (actual). Primary completion is estimated for Dec 2026, 78 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 30, 2025
First posted
Aug 13, 2025
StartActual
Jun 1, 2020
Primary completionEst.
Dec 30, 2026
CompletionEst.
Dec 30, 2026
Last update
Aug 13, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 13, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT07119723
Lead sponsor
Tianjin Medical University Eye Hospital
Responsible party
Chuanzhen Zheng (Principal investigator, Tianjin Medical University Eye Hospital) — Principal investigator
First posted
Aug 13, 2025
Start date
Jun 1, 2020
Primary completion
Dec 30, 2026 (estimated)
Completion
Dec 30, 2026 (estimated)
Last update
Aug 13, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Interested in this study?

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No contact was published for this record. The registry link below has the sponsor’s details.

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Discussion

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Tianjin Medical University Eye Hospital

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