Why is time outside protective against myopia? A review of the evidence (C-101625)

25 March 2022
Volume 23, Issue 1

This article reviews the evidence for the protective effect of daylight on myopia.

Domains covered

Professionalism Clinical practice

The prevalence of myopia has risen rapidly in recent decades and is largely attributable to our changing lifestyles. Early visual experiences can affect the axial growth of the eye but just how this occurs is not clearly understood. In this review, we discuss the evidence which supports the protective effect of time outside on myopia and why it is likely that exposure to natural daylight is responsible. We compare how artificial indoor lighting differs from daylight in brightness, colour spectrum and flicker, and how these factors influence growth of the eye. We discuss why periods of home confinement during the COVID-19 pandemic have led to further increases in the prevalence of myopia among young children, and how optometrists should advise people seeking to delay the onset or slow down the progression of myopia in their children.

Sign in to continue

Forgotten password?

Sign in to view the article

Not a member? Start enjoying the benefits of College membership today. Take a look at what the College can offer you and view our membership categories and rates.

Related further reading

Eye health issues that are making the news - Autumn 2022.

Read, download and print Acuity's infographic focusing on myopia prevalence and treatment.

As the nights draw in and winter deepens, we may experience some problems with our vision, and find that our eyes need some seasonal care.