Prevalence of Blindness, Visual Impairment in Chao Nan Area, China
NCT04143334
·
clinicaltrials.gov ↗
COMPLETED
Status
3700
Enrollment
OTHER
Sponsor class
Conditions
Blindness
Cataract
Visual Impairment
Refractive Errors
Interventions
DIAGNOSTIC_TEST:
Conventional survey
Sponsor
Chinese University of Hong Kong