Associations Between Screen Exposure in Early Life and Myopia amongst Chinese Preschoolers
Open Access
- 7 February 2020
- journal article
- research article
- Published by MDPI AG in International Journal of Environmental Research and Public Health
- Vol. 17 (3), 1056
- https://doi.org/10.3390/ijerph17031056
Abstract
This study aimed to explore the association between screen exposure in early life and preschool myopia. During the baseline survey of the Longhua Child Cohort Study (LCCS), data of 29,595 preschoolers were collected via a caregiver-reported questionnaire regarding children’s socio-demographic characteristics, visual status, screen exposure and relevant parental information. Data of 26,433 preschoolers with normal eyesight or myopia were included in the analysis and cox regression modelling was employed to assess the associations. Results suggested the hypothesis that screen exposure in early life could be significantly and positively associated with preschool myopia, and in agreement with this hypothesis was the association being strengthened with the increasing daily exposure duration and total years of exposure; in the stratification analysis based on the presence of parental myopia, these associations still existed, and the strength of associations was stronger in preschoolers with myopic parents than those without. Moreover, a statistically significant association was only observed between initial screen exposure that occurred during 0–1-years old and myopia for preschoolers without myopic parents, while the significant associations were observed between initial screen exposure that occurred during 0–1, 1–2, 2–3, and after 3 years old and myopia for preschoolers who had myopic parents, with the strongest association found in the group of children initially exposed to electronic screens during 0–1 year old. Thus our findings indicated the hypothesis that screen exposure in early life might be associated with the occurrence of preschool myopia, and that the postnatal first year might be the sensitive period for the association. However, it is premature to conclude that early screen time leads to myopia with current data. Further longitudinal studies performed with cycloplegia are necessary to verify the hypothesis and shed light on the more urgent question whether early screen exposure contributes to the later myopia epidemic of school-aged children.This publication has 54 references indexed in Scilit:
- Screen time use in children under 3 years old: a systematic review of correlatesInternational Journal of Behavioral Nutrition and Physical Activity, 2013
- Myopia Over the Lifecourse: Prevalence and Early Life Influences in the 1958 British Birth CohortOphthalmology, 2011
- Accommodative lag and juvenile-onset myopia progression in children wearing refractive correctionVision Research, 2011
- Change in vision disorders among Hong Kong preschoolers in 10 yearsClinical & Experimental Ophthalmology, 2011
- Do excessive internet use, television viewing and poor lifestyle habits affect low vision in school children?Journal of Child Health Care, 2010
- Obesity and low vision as a result of excessive Internet use and television viewingInternational Journal of Food Sciences and Nutrition, 2010
- Ocular Component Growth Curves among Singaporean Children with Different Refractive Error StatusInvestigative Ophthalmology & Visual Science, 2010
- How blinding is pathological myopia?British Journal of Ophthalmology, 2006
- Emmetropisation following preterm birthBritish Journal of Ophthalmology, 2002
- Emmetropisation, squint, and reduced visual acuity after treatment.British Journal of Ophthalmology, 1991