# Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin

> **NCT05336799** · — · UNKNOWN · sponsor: **Tianjin Eye Hospital** · enrollment: 500000 (estimated)

## Conditions studied

- Myopia
- Refractive Errors

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT05336799
- **Lead sponsor:** Tianjin Eye Hospital
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** UNKNOWN
- **Start date:** 2021-03-01
- **Primary completion:** 2022-12-01
- **Final completion:** 2025-12-31
- **Target enrollment:** 500000 (ESTIMATED)
- **Last updated:** 2022-11-29


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05336799

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05336799, "Prevalence and Environmental Factors for Myopia Among Chinese School-aged Children and Adolescent in Tianjin". Retrieved via AI Analytics 2026-06-04 from https://api.ai-analytics.org/clinical/NCT05336799. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*