Characteristics of astigmatism in a population of Tunisian school-children

Chebil, Ahmed; Jedidi, Lina; Chaker, N.; Kort, Fedra; R, Limaiem; Mghaieth, F.; Matri, L. El

doi:10.4103/0974-9233.150635

Cited by 22 publications

(13 citation statements)

References 27 publications

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“…Chan et al [4] reported that 32.9% of Taiwanese schoolchildren had astigmatism >1.0 D, a prevalence higher than that of our study. We did not detect correlations with either gender or age like those reported by Chebil et al [22] and Fotouhi et al [9]. Our results also agreed with others [4, 23, 24], where most schoolchildren had WTR astigmatism.…”

Section: Discussionsupporting

confidence: 90%

Simultaneous Changes in Astigmatism with Noncycloplegia Refraction and Ocular Biometry in Chinese Primary Schoolchildren

Lin

Jiang

et al. 2019

Journal of Ophthalmology

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Purpose. To assess the changing profile of astigmatism in Chinese schoolchildren and the association between astigmatism changes and ocular biometry. Methods. We examined and followed up 1,463 children aged 6–9 years from Wenzhou, China. We measured noncycloplegic refraction twice each year and tested axial length (AL) and corneal radius of curvature (CRC) annually for two years. We defined clinically significant astigmatism (CSA) as ≤−0.75 diopter (D) and non-CSA astigmatism as ≤0 to >−0.75 D. Results. Prevalence of CSA at baseline was 22.4% (n = 327) and decreased to 20.3% (n = 297) at the two-year follow-up (P=0.046). Ninety-two (8.1%) non-CSA children developed CSA. In multiple regression, after adjusting for age, gender, baseline cylinder refraction, and axis, children who had longer baseline ALs (>23.58 mm; odds ratio (OR) = 5.19, 95% confidence interval (CI): 2.72–9.90) and longer baseline AL/CRC ratio (>2.99, OR = 4.99, 95% CI: 2.37–10.51) were more likely to develop CSA after two years. Four-hundred and two (27.5%) children had increased astigmatism, 783 (53.5%) had decreased, and 278 (19.0%) had no change during the two-year follow-up. Children with increased astigmatism had longer baseline ALs (23.33 mm, P<0.001), higher AL/CRC ratios (2.99 mm, P<0.001), and more negative spherical equivalent refraction (SER) (−0.63 D, P<0.001) compared with the decreased and no astigmatism change subgroups. Also, children in the increased astigmatism subgroup had more AL growth (0.68 mm, P<0.001), higher increases in AL/CRC ratio (0.08, P<0.001), and more negative SER change (−0.86 D, P<0.001) compared with the decreased and no astigmatism change subgroups. Conclusions. The prevalence of astigmatism decreased slightly over the two-year study period. Longer ALs and higher AL/CRC ratios were independent risk factors for developing CSA. Increased astigmatism was associated with AL growth, AL/CRC ratio increases, and the development of myopia. This trial is registered with ChiCTR1800019915.

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Section: Discussionsupporting

confidence: 90%

Simultaneous Changes in Astigmatism with Noncycloplegia Refraction and Ocular Biometry in Chinese Primary Schoolchildren

Lin

Jiang

et al. 2019

Journal of Ophthalmology

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“…The prevalence of astigmatism in this study (38.4%) is similar to the values reported in southern Taiwan (32.9%) [ 22 ], Hangzhou (32.7%) [ 23 ], and Shandong (36.6%) [ 13 ], but significantly higher than those in multiethnic countries (Asian children (8.29%), European children (18.1%), non-Hispanic white children (6.33%), and Tunisian children (6.67%) [ 24 – 26 ]), which suggests that the prevalence of astigmatism in children and teenagers may be related to racial differences. As early as 2007, some scholars explained it from the perspective of genes [ 27 ].…”

Section: Discussionsupporting

confidence: 85%

Prevalence of Refractive Error in School Children in Suining City of Sichuan Province, China: A School-Based Cross-Sectional Study

Liu

Tang

et al. 2022

Applied Bionics and Biomechanics

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Objective. To investigate the prevalence of refractive errors among school children in Suining City, Sichuan Province, and to provide a scientific basis for prevention and control of myopia. Methods. This was a school-based cross-sectional study. Children aged 6-15 years were selected from kindergartens, primary schools, and middle schools in the urban setting of Suining City. The children underwent ocular examination including measurement of uncorrected visual acuity (UCVA), visual acuity when wearing glasses, and noncycloplegic autorefractometry. Results. Of the 1200 eligible students, 1138 children (94.8%), 553 of them girls (47.4%), participated. The mean age was 10.64 ± 2.89 years. The prevalence of myopia, hyperopia, astigmatism, and emmetropia was 59.1% (95% confidence interval (CI): 57.6, 60.5), 5.0% (95% CI: 4.7, 6.1), 38.4% (95% CI: 55.5, 58.5), and 25% (95% CI: 23.7, 26.2), respectively. In univariate analysis, the prevalence of myopia was correlated with age, female gender, and learning stage. The prevalence of hyperopia and astigmatism was correlated with age and learning stage. The prevalence of mild myopia, moderate myopia, and high myopia in the 1138 students was 17.7%, 41.4%, and 3.3%, respectively. The prevalence of mild, moderate, and high myopia all increased with age and learning stage. The prevalence of myopia differed by gender. The mean spherical equivalents of the right and left eyes were − 1.40 ± 1.99 diopters (D) and − 1.29 ± 1.93 D , respectively, and the median values were -0.75 D and -0.6 D, respectively. The mean spherical equivalent increased with age, learning stage, and female gender. Conclusions. The most common type of refractive error was myopia which was associated with higher age, female gender, and higher learning stage. This study provides new data and recommendations for myopia-control in school-aged children in Sichuan province.

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“…In this investigation the prevalence of astigmatism was 6.67% and increased statistically significantly with age ( P = 0.032), but was not significantly related to gender ( P = 0.051). In our investigation we found similar results; the prevalence of astigmatism was 25.5%, astigmatism increased with older age and was not associated with gender ( 43 ).…”

Section: Discussionsupporting

confidence: 85%

Refractive errors characteristic of the patients at the Children’s Ophthalmology Outpatient Department of Kauno klinikos Hospital (Lithuanian University of Health Sciences) from 1 January 2012 to 31 December 2012

Čiumbaraitė

Liutkevičienė

2017

AML

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Background.The purpose of our study was to assess the distribution and patterns of refractive errors in children for the proper planning of paediatric eye care at the centre.Material and methods.The study was conducted in the hospital of the Lithuanian University of Health Sciences in Kaunas, from 1 January 2012 to 31 December 2012. During this period, a total of 11,406 children, aged 0–18 years, were evaluated at the outpatient department of paediatric ophthalmology, Kauno klinikos, the Lithuanian University of Health Sciences. All the children underwent a complete ophthalmic examination with cycloplegic refraction.Results.Myopia increased from 1.5% (95% CI:1.2, 1.8) in the age group of 0–1 to 44.7% (95% CI:43.46, 45.94) in the age group of 14–18 (p < 0.001). Myopia was associated with older age, female gender (20.3%; 95% CI:19.3, 21.3; p < 0.001). Hypermetropia decreased from 84.6% (95% CI:83.7, 85.5) in the cohort of 0–1 to 11.4% (95% CI: 10.61, 12.19) in the 14–18 age group (p < 0.001). Hypermetropia was associated with younger age, male gender (43.4%; 95% CI:42.16, 44.64; p < 0.001), preterm birth (56.1%; 95% CI:54.86, 57.34; 43.4%; p < 0.001), low birth weight (61.8%; 95% CI:60.59, 63.01; p < 0.001), and birth by Caesarean section (57.1%; 95% CI: 55.87; 58.33) (p < 0.001).The prevalence of astigmatism was 25.5% (95% CI: 24.41; 26.59) (p < 0.001). Astigmatism was associated with female gender (20.1%; 95%. CI: 19.1; 21.1) and too big pregnancy weight (22.1%.; 95%. CI: 21.06; 23.14) (p < 0.001).Conclusions.Of the 14–18 age group, 44.7% of the patients were myopic. Of the 0–1 age group, 84.6% were hypermetropic. Astigmatism was detected in about 25.5% of children. The prevalence of refractive errors was associated with age, gender, gestation age, gestation weight, and parental refractive error.

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Characteristics of astigmatism in a population of Tunisian school-children

Cited by 22 publications

References 27 publications

Simultaneous Changes in Astigmatism with Noncycloplegia Refraction and Ocular Biometry in Chinese Primary Schoolchildren

Simultaneous Changes in Astigmatism with Noncycloplegia Refraction and Ocular Biometry in Chinese Primary Schoolchildren

Prevalence of Refractive Error in School Children in Suining City of Sichuan Province, China: A School-Based Cross-Sectional Study

Refractive errors characteristic of the patients at the Children’s Ophthalmology Outpatient Department of Kauno klinikos Hospital (Lithuanian University of Health Sciences) from 1 January 2012 to 31 December 2012

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