Eilidh Geddes, Sibylle Mohr, Elizabeth Sian Mitchell, Sara Robertson, Anna M Brzozowska, Stewart T G Burgess, Valentina Busin
Exploiting Scanning Surveillance Data to Inform Future Strategies for the Control of Endemic Diseases: The Example of Sheep Scab
Frontiers in veterinary science
time spent outdoor activities decreased owing home confinement coronavirus disease 2019 covid19 pandemic concerns raised whether home confinement may worsened burden myopia owing substantially decreased time spent outdoors increased screen time home investigate refractive changes prevalence myopia schoolaged children covid19 home confinement prospective crosssectional study using schoolbased photoscreenings 123 535 children aged 6 13 years 10 elementary schools feicheng china conducted study performed 6 consecutive years 20152020 data analyzed july 2020 noncycloplegic photorefraction examined using photoscreener device spherical equivalent refraction recorded child prevalence myopia age group year calculated mean spherical equivalent refraction prevalence myopia compared 2020 home confinement previous 5 years age group 123 535 children included study 64 335 521 boys total 194 904 test results 389 808 eyes included analysis substantial myopic shift approximately 03 diopters found 2020 schoolbased photoscreenings compared previous years 20152019 younger children aged 6 032 7 028 8 029 years prevalence myopia 2020 photoscreenings higher highest prevalence myopia within 20152019 children aged 6 215 vs 57 7 262 vs 162 8 372 vs 277 years differences spherical equivalent refraction prevalence myopia 2020 previous years minimal children aged 9 13 years home confinement covid19 pandemic appeared associated significant myopic shift children aged 6 8 years according 2020 schoolbased photoscreenings however numerous limitations warrant caution interpretation associations including use noncycloplegic refractions lack orthokeratology history ocular biometry data younger childrens refractive status may sensitive environmental changes older ages given younger children critical period development myopia