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Cross-sectionalFrontiers in medicine · 2026

Cross-sectional associations of nighttime sleep and daytime nap duration with myopia in preschool children: the mediating role of body mass index.

Xiumei Chen, Dan Liu, Wei Du, Changhua Wu

OphthalmologyCross-sectional

Longer nighttime sleep is associated with lower myopia risk in preschool children.

Cross-sectional associations of nighttime sleep and daytime nap duration with myopia in preschool children: the mediating role of body mass index.

Xiumei Chen … Changhua Wu

Frontiers in medicine · 2026

Purpose

To investigate the associations of nighttime sleep and daytime nap duration with myopia in preschool children, and to examine the mediating role of body mass index (BMI).

Methods

This cross-sectional study included 695 children aged 3-7 years.

n = 695 children

OR = 0.48

Results

OR = 0.48

children who slept longer at night had lower odds of nearsightedness

n = 695 children

More results

The prevalence of myopia was 21.29%.

A protective inflection point was identified at 38 min for daytime napping.

BMI partially mediated the associations of daytime nap and nighttime sleep with myopia, accounting for 24.79 and 28.16% of the total effects, respectively.

“

Conclusion · 1 of 2

Both nighttime sleep and daytime nap duration were inversely associated with myopia risk in preschool children, with BMI playing a partial mediating role.

Conclusion · 2 of 2

Ensuring adequate nighttime sleep and appropriate daytime napping may represent an effective strategy for early myopia prevention.

Post

Cross-sectional associations of nighttime sleep and daytime nap duration with myopia in preschool children: the mediating role of body mass index.

Longer nighttime sleep is associated with lower myopia risk in preschool children.

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