Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
4000 participants
OBSERVATIONAL
2019-12-14
2023-02-02
Brief Summary
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Detailed Description
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Therefore, the investigators will conduct a longitudinal cohort study in both urban and rural settings to examine prevalence and incidence of myopia, identify digital biomarkers associated with myopia, and validate algorithms for the detection and/or predition of incidence and progression of myopia and other ocular abnormalities in school-aged children in Zhaoqing.
Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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Students in urban counties
All first-grade students in urban counties will undergo anthropometry and ophthalmic examination, and be required to complete questionnaires and wear wearable devices to collect environmental information and daily activities.
Ophthalmic examinations
Ophthalmic examinations include visual acuity, cover test and ocular dominance, noncycloplegic autorefraction, cycloplegia, ocular biometric measurements, cycloplegic auto-refraction, subjective refraction, and anterior and posterior segment examination.
Wearable devices
Physical activity, light intensity, and visual information will be measured with wearable devices.
Students in rural counties
All first-grade students in rural counties will undergo anthropometry and ophthalmic examination, and be required to complete questionnaires and wear wearable devices to collect environmental information and daily activities.
Ophthalmic examinations
Ophthalmic examinations include visual acuity, cover test and ocular dominance, noncycloplegic autorefraction, cycloplegia, ocular biometric measurements, cycloplegic auto-refraction, subjective refraction, and anterior and posterior segment examination.
Wearable devices
Physical activity, light intensity, and visual information will be measured with wearable devices.
Interventions
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Ophthalmic examinations
Ophthalmic examinations include visual acuity, cover test and ocular dominance, noncycloplegic autorefraction, cycloplegia, ocular biometric measurements, cycloplegic auto-refraction, subjective refraction, and anterior and posterior segment examination.
Wearable devices
Physical activity, light intensity, and visual information will be measured with wearable devices.
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
6 Years
7 Years
ALL
Yes
Sponsors
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Sun Yat-sen University
OTHER
Responsible Party
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Yingfeng Zheng
Clinical investigator
Locations
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Zhognshan Ophthalmic Center, Sun Yat-sen University
Guangzhou, Guangdong, China
Schools
Zhaoqing, Guangdong, China
Countries
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Central Contacts
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Facility Contacts
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References
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Morgan IG, Ohno-Matsui K, Saw SM. Myopia. Lancet. 2012 May 5;379(9827):1739-48. doi: 10.1016/S0140-6736(12)60272-4.
Zadnik K, Mutti DO. Outdoor Activity Protects Against Childhood Myopia-Let the Sun Shine In. JAMA Pediatr. 2019 May 1;173(5):415-416. doi: 10.1001/jamapediatrics.2019.0278. No abstract available.
Ojaimi E, Rose KA, Smith W, Morgan IG, Martin FJ, Mitchell P. Methods for a population-based study of myopia and other eye conditions in school children: the Sydney Myopia Study. Ophthalmic Epidemiol. 2005 Feb;12(1):59-69. doi: 10.1080/09286580490921296.
Li SM, Liu LR, Li SY, Ji YZ, Fu J, Wang Y, Li H, Zhu BD, Yang Z, Li L, Chen W, Kang MT, Zhang FJ, Zhan SY, Wang NL, Mitchell P; Anyang Childhood Eye Study Group. Design, methodology and baseline data of a school-based cohort study in Central China: the Anyang Childhood Eye Study. Ophthalmic Epidemiol. 2013 Dec;20(6):348-59. doi: 10.3109/09286586.2013.842596. Epub 2013 Oct 25.
He M, Zheng Y, Xiang F. Prevalence of myopia in urban and rural children in mainland China. Optom Vis Sci. 2009 Jan;86(1):40-4. doi: 10.1097/OPX.0b013e3181940719.
Negrel AD, Maul E, Pokharel GP, Zhao J, Ellwein LB. Refractive Error Study in Children: sampling and measurement methods for a multi-country survey. Am J Ophthalmol. 2000 Apr;129(4):421-6. doi: 10.1016/s0002-9394(99)00455-9.
Chen X, Ye G, Zhong Y, Jin L, Liang X, Zeng Y, Zheng Y, Lan M, Liu Y. Prevalence, incidence, and risk factors for myopia among urban and rural children in southern China: protocol for a school-based cohort study. BMJ Open. 2021 Nov 5;11(11):e049846. doi: 10.1136/bmjopen-2021-049846.
Other Identifiers
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2019KYPJ171
Identifier Type: -
Identifier Source: org_study_id
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