Greenness Surrounding Schools and Visual Impairment in Chinese Children and Adolescents.

ABSTRACT:

Background

Evidence concerning the effects of greenness on childhood visual impairment is scarce.

Objectives

We aimed to assess whether greenness surrounding schools was associated with visual impairment prevalence and visual acuity levels in Chinese schoolchildren and whether the associations might be explained by reduced air pollution.

Methods

In September 2013, we recruited 61,995 children and adolescents 6-18 years of age from 94 schools in seven provinces/municipalities in China. Greenness exposure was assessed using the normalized difference vegetation index (NDVI) and the soil-adjusted vegetation index (SAVI) from July to August 2013. Visual impairment was defined as at least one visual acuity level (dimensionless) lower than 4.9 (Snellen 5/6 equivalent). Three

SUBMITTER: Yang BY 

PROVIDER: S-EPMC8549527 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature