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dc.contributorSchool of Optometryen_US
dc.creatorLiang, Yen_US
dc.creatorLeung, Ten_US
dc.creatorLian, JTen_US
dc.creatorKee, Cen_US
dc.publisherTaylor Francisen_US
dc.subjectRefractive erroren_US
dc.titleSignificant increase in astigmatism in children after study at home during the COVID-19 lockdownen_US
dc.typeJournal/Magazine Articleen_US
dcterms.abstractClinical relevance: Evaluating changes in refractive astigmatism after ‘study at home’ during the COVID pandemic may shed light on the aetiology of refractive errors.en_US
dcterms.abstractBackground: To investigate whether there has been a change in the proportion of astigmatism among primary school children after the school closure period during the COVID-19 pandemic.en_US
dcterms.abstractMethods: This observational study compared cross-sectional (2018: n = 112; 2020: n = 173) and longitudinal data (n = 38) collected from two vision screenings, one in 2018 and the other after the school closure period in 2020, in the same primary school for children aged 8–10 years. Noncycloplegic refraction and axial length were measured using an open-field auto-refractometer and IOL Master, respectively. A questionnaire focusing on demographic information, near-work time, and outdoor activities was administered to parents of all participants.en_US
dcterms.abstractResults: While there were no significant differences in age, gender, or monthly family income between the two cohorts, astigmatism proportion (Cyl ≥ 0.75 D) in 2020 was 1.5-fold higher than that in 2018 (56.6% vs. 35.4%). The median cylindrical power was significantly higher in 2020 in older children (9 or 10 years old). More importantly, the children participating in both vision screenings had cylindrical power and J0 astigmatism significantly increased by 0.35 ± 0.40 D and 0.21 ± 0.25 D, respectively.en_US
dcterms.abstractConclusion: A significant increase in astigmatism (both proportion and magnitude) was found after the school closure period. Further studies are needed to investigate the origin of this increased astigmatism.en_US
dcterms.accessRightsembargoed accessen_US
dcterms.bibliographicCitationClinical and experimental optometry, 2022,
dcterms.isPartOfClinical and experimental optometryen_US
dc.description.validate202201 bchyen_US
dc.description.oaNot applicableen_US
dc.description.fundingTextThis study was supported by The Centre of Myopia Research from The Hong Kong Polytechnic University and Innovation and Technology Fund for Better Living [ITB/FBL/4010/18/P].en_US
dc.description.pubStatusEarly releaseen_US
Appears in Collections:Journal/Magazine Article
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Status embargoed access
Embargo End Date 2023-01-12
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