To objectively assess daily light exposure and physical activity levels in myopic and emmetropic children.One hundred two children (41 myopes and 61 emmetropes) aged 10 to 15 years old had simultaneous objective measures of ambient light exposure and physical activity collected over a 2-week period during school term, using a wrist-worn actigraphy device (Actiwatch 2). Measures of visible light illuminance and physical activity were captured every 30 seconds, 24 hours a day over this period. Mean hourly light exposure and physical activity for weekdays and weekends were examined. To ensure that seasonal variations did not confound comparisons, the light and activity data of the 41 myopes was compared with 41 age- and gender-matched emmetropes who wore the Actiwatch over the same 2-week period.Mean light exposure and physical activity for all 101 children with valid data exhibited significant changes with time of day and day of the week (p < 0.0001). On average, greater daily light exposure occurred on weekends compared to weekdays (p < 0.05), and greater physical activity occurred on weekdays compared to weekends (p < 0.01). Myopic children (n = 41, mean daily light exposure 915 ± 519 lx) exhibited significantly lower average light exposure compared to 41 age- and gender-matched emmetropic children (1272 ± 625 lx, p < 0.01). The amount of daily time spent in bright light conditions (>1000 lx) was also significantly greater in emmetropes (127 ± 51 minutes) compared to myopes (91 ± 44 minutes, p < 0.001). No significant differences were found between the average daily physical activity levels of myopes and emmetropes (p > 0.05).Myopic children exhibit significantly lower daily light exposure, but no significant difference in physical activity compared to emmetropic children. This suggests the important factor involved in documented associations between myopia and outdoor activity is likely exposure to bright outdoor light rather than greater physical activity.

Scott A Read

Michael J Collins

Stephen J Vincent

Optometry and Vision Science

OPTOMETRY AND VISION SCIENCE 是美国验光学会的月度同行评审科学出版物，自 1924 年以来发表原创研究。 OPTOMETRY AND VISION SCIENCE 是国际公认的关于当前验光、生理光学、视觉科学发现的教育和信息来源，及相关领域。该杂志考虑了推动临床实践、视觉科学和公共卫生的原创性贡献。作者应该记住，该杂志的读者遍及全球，他们的投稿应该与广大读者相关并引起他们的兴趣。主题优先事项包括但不限于：临床和实验室研究、循证审查、隐形眼镜、眼球生长和屈光不正发展、眼球运动、视觉功能和感知、眼睛生物学和眼部疾病、流行病学和公共卫生，生物医学光学和仪器，新颖和重要的临床观察和治疗，以及验光教育。

Optometry and Vision Science is a monthly peer-reviewed scientific journal of the American Academy of Optometry, publishing original research since 1924. It is internationally recognized as a key source of education and information on current discoveries in optometry, physiological optics, and vision science, as well as related fields. The journal welcomes original contributions that advance clinical practice, vision science, and public health. Authors should keep in mind that the readership of the journal is global, and their submissions should be relevant and engaging to a wide audience. Priority topics include, but are not limited to: clinical and laboratory research, evidence-based reviews, contact lenses, ocular growth and refractive development, eye movements, visual function and perception, ocular biology and eye diseases, epidemiology and public health, biomedical optics and instrumentation, novel and significant clinical observations and treatments, and optometric education.

《Optometry and Vision Science》是美国验光学会的月度同行评审科学期刊，自1924年以来发表原创研究。该期刊被国际公认为关于当前验光、生理光学和视觉科学发现的重要教育和信息来源，涵盖相关领域。期刊欢迎推动临床实践、视觉科学和公共卫生的原创性贡献。作者应考虑到该期刊的读者遍布全球，因此投稿内容应与广大读者相关并引起他们的兴趣。主题优先事项包括但不限于：临床和实验室研究、循证审查、隐形眼镜、眼球生长和屈光不正发展、眼球运动、视觉功能和感知、眼睛生物学和眼部疾病、流行病学和公共卫生、生物医学光学和仪器、新颖和重要的临床观察和治疗，以及验光教育。

Light Exposure and Physical Activity in Myopic and Emmetropic Children

The important factor involved in documented associations between myopia and outdoor activity is likely exposure to bright outdoor light rather than greater physical activity.

Category	Quartile
医学	4
医学, 眼科学	4

Light Exposure and Physical Activity in Myopic and Emmetropic Children

ivySCI AI Smartly Parses PDF, Answers Researchers' Questions, and Helps You Understand Papers in Seconds

Journal Info