Objectively measured near work, outdoor exposure and myopia in children

AimTo reassess the association between near work, outdoor exposure and myopia in children through an objective approach.MethodsEighty-six children (10.13±0.48 years) were asked to wear Clouclip, a newly developed wearable device that is able to measure working distance and eye-level illuminance, for...

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Veröffentlicht in:British journal of ophthalmology Jg. 104; H. 11; S. 1542 - 1547
Hauptverfasser: Wen, Longbo, Cao, Yingpin, Cheng, Qian, Li, Xiaoning, Pan, Lun, Li, Lei, Zhu, HaoGang, Lan, Weizhong, Yang, Zhikuan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: England BMJ Publishing Group LTD 01.11.2020
BMJ Publishing Group
Schlagworte:
Child
Clinical Science
Epidemiology
Female
Humans
Leisure Activities
Light
Male
Myopia - physiopathology
Outdoor activities
Outdoors
Radiometry - instrumentation
Reading
Refraction, Ocular - physiology
Sensors
Students
Sunlight
Surveys and Questionnaires
Variables
Work - physiology
China
epidemiology
optics and refraction
ISSN:0007-1161, 1468-2079, 1468-2079
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Zusammenfassung:AimTo reassess the association between near work, outdoor exposure and myopia in children through an objective approach.MethodsEighty-six children (10.13±0.48 years) were asked to wear Clouclip, a newly developed wearable device that is able to measure working distance and eye-level illuminance, for a complete week to obtain information on near work and outdoor exposure. The mean daily Clouclip wearing time was 11.72±1.14 hour. The spherical equivalent refraction was determined by cycloplegic autorefraction.ResultsThe myopic children were found to be exposed to light intensities >3000 lux (0.68±0.50 hour vs 1.02±0.53 hour, p=0.012) and >5000 lux (0.42±0.35 hour vs 0.63±0.31 hour, p=0.004) for shorter durations on average each day than the non-myopic children. Additionally, the myopic children spent more time on average each day on activities at a distance of <20 cm than non-myopic children (1.89±0.61 hour vs 1.52±0.77 hour, p=0.019). In the multivariate logistic analysis, the time spent with a higher light intensity (>3000 lux (OR=0.27, 95% CI: 0.10 to 0.72, p=0.009); >5000 lux (OR=0.11, 95% CI: 0.02 to 0.56, p=0.008)) and a working distance of <20 cm (in a circumstance of >3000 lux (OR=1.17, 95% CI: 1.09 to 1.86, p=0.038) or in that of >5000 lux (OR=1.12, 95% CI: 1.03 to 1.77, p=0.046)) were the independent protective factors and risk factors, respectively.ConclusionThe current study provides novel evidence, based on objective data, to support the association between the intensity of near work, light intensity and myopia. However, the causality and the dose-effect relationship need to be investigated further.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0007-1161
1468-2079
1468-2079
DOI:10.1136/bjophthalmol-2019-315258