Evaluating the optimised font size and viewing time of online learning in young children: a multicentre cross-sectional study.

ABSTRACT:

Objectives

Near viewing distance (VD) and longer viewing times are associated with myopia. This study aimed to identify the font size and viewing time that guarantee the appropriate VD and pixels per degree (PPD) for children's online learning.

Design

This cross-sectional study comprised two experiments. In experiment A, participants read text in five font sizes on three backlit displays (a personal computer, a smartphone and a tablet), an E-ink display and paper for 5 min per font size. In experiment B, participants watched videos for 30 min on three backlit displays.

Setting

The Peking University People's Hospital in Beijing (China) and the School of Ophthalmology and Optometry, Wenzhou Medical University (Zhejiang Province, China).

Participants

Thirty-five p

SUBMITTER: Ma LU 

PROVIDER: S-EPMC10151978 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature