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Prevalence of High Astigmatism in Salta Province, Argentina

20 Pages Posted: 4 May 2021

See all articles by Luis Zeman Bardeci

Luis Zeman Bardeci

University of Buenos Aires (UBA) - Department of Ophthalmology

Ruben D. Danza

University of Buenos Aires (UBA) - Segunda Cátedra de Oftalmología

Laura Fejerman

University of California, Davis - Department of Public Health Sciences

Rafael Iribarren

Drs. Iribarren Eye Consultants

More...

Abstract

Background: Refractive errors are the first cause of visual impairment across the world. Prevalence data are crucial for planning visual health strategies, since early detection and treatment of refractive errors in children has a key role on normal vision development. This is the largest report in Argentina that has studied refractive errors under cycloplegic refraction in school-aged childre

Methods: Cross-sectional population based study, which involved school children aged 4-15 year-old examined from March to November 2014. Automated cycloplegic refractive error measurement and subjective refraction were performed. Myopia was considered as the spherical equivalent refractive error <-0·50 dioptres, hyperopia as >+2·00 D. For the purpose of this study, astigmatism was considered as that equal or greater than -2·00 dioptres.

Findings: The sample consisted of 1852 children aged 8·03 ± 2·57 years, range 4 to 15 years of whom 967 (52·2%) were females. 116 subjects (6·26%) had a spherical equivalent lower or equal than -0·50 dioptres and there were 111 (5·99%) subjects with refractive cylinder ≤ -2·00 dioptres (limit -7·50 dioptres). In the Seclantas zone (mountainside) the sample comprised 157 children, of whom 20 (12·75%) had astigmatic values in the right eyes ≤ than -2·00 dioptres. 

Interpretation: An elevated prevalence of high astigmatism and a very low prevalence of myopia were found in this population. Future studies including diverse populations with high prevalence of high astigmatism could contribute to a better understanding of the relevant factors in the etiology of this trait.

Funding Information: None.

Declaration of Interests: None of the authors have any proprietary interests or conflicts of interest related to this submission.

Ethics Approval Statement: This screening was approved by the local authorities of Salta. The present study was also approved by the Ethics Committee of the Argentinian Council of Ophthalmology. Two weeks before the ocular exam took place in each school an informed consent was sent as homework for the parents to allow and sign for the examination. All data were treated confidentially in accordance to the Declaration of Helsinki and Argentine Laws.

Keywords: myopia, astigmatism, school children, epidemiology

Suggested Citation

Zeman Bardeci, Luis and Danza, Ruben D. and Fejerman, Laura and Iribarren, Rafael, Prevalence of High Astigmatism in Salta Province, Argentina. Available at SSRN: https://ssrn.com/abstract=3839399 or http://dx.doi.org/10.2139/ssrn.3839399

Luis Zeman Bardeci (Contact Author)

University of Buenos Aires (UBA) - Department of Ophthalmology ( email )

Buenos Aires
Argentina

Ruben D. Danza

University of Buenos Aires (UBA) - Segunda Cátedra de Oftalmología ( email )

Av. Cordoba 2122
Buenos Aires, Buenos Aires 1120
Argentina

Laura Fejerman

University of California, Davis - Department of Public Health Sciences ( email )

Davis, CA
United States

Rafael Iribarren

Drs. Iribarren Eye Consultants ( email )

Argentina

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