Frequency Of Refractive Errors Research Articles

Ethnicity and refractive errors in Peruvian children aged 7–11 years: A five-year analysis of the Demographic and Health Survey

ObjectiveTo assess the association between ethnicity and self-reported refractive errors (REs) among Peruvian children aged 7–11 years. Materials and methodsWe conducted a cross-sectional study incorporating a secondary data analysis of 2017–2021 data from the Peruvian Demographic and Health Survey (DHS). REs and ethnicity were obtained from focal child's mother's report. Four outcomes were assessed: hyperopia, myopia, astigmatism and any RE. We included potential confounders, such as age, sex, wealth index, area of residence, region of origin, frequency of watching TV and watching screens at less than 30 cm distance. Generalised linear models with the Poisson family and log link function were used to calculate crude prevalence ratio and adjusted prevalence ratio (aPR) with 95% confidence intervals (95% CI). ResultsData from a total of 52,753 children were included. The prevalence of RE in children aged 7–11 years was 10.90% (95% CI 10.49–11.33), of which 5.19% were hyperopia, 3.35% myopia and 2.36% astigmatism. Those of the Aymara ethnicity were less likely to suffer from any RE and astigmatism (aPR = 0.68, 95% CI 0.46–0.99, p = 0.046; aPR = 0.70, 95% CI 0.53–0.92, p = 0.012, respectively), Members of Amazon groups were more likely to have hyperopia (aPR = 1.95, 95% CI 1.14–3.36, p = 0.015) and Quechuas were more likely to have myopia (aPR =1.29, 95% CI 1.02–1.62, p = 0.028), where all were compared to Mestizos. ConclusionAbout 1 in 10 Peruvian children suffer from a RE. The most frequent RE in this study was hyperopia. Ethnic differences were seen in the frequency of RE.

UCI EyeMobile Exam Findings from School Children Following on-Site Screening.

Uncorrected refractive errors (REs) and amblyopia can lead to visual impairment with deleterious effects on quality of life and academic performance. Early detection and treatment by community vision care programs, such as the UCI EyeMobile for Children, can aid in addressing preventable vision loss. A total of 5074 children between the ages of 3 and 10 years were screened at 153 locations, including preschools, head start programs, and elementary schools within Orange County (OC), California (CA). Subsequently, 1024 children presented for comprehensive eye examinations. A retrospective analysis of all examined children was conducted, determining the frequency and severity of REs and amblyopia and the spectacle prescription rate by age. Propensity score matching analysis evaluated the effect of median household income on RE and amblyopia frequency. Among those who failed initial screening and were subsequently examined, significant rates of REs and amblyopia were detected: myopia (24.4%), hyperopia (35.4%), astigmatism (71.8%), anisometropia (8.9%), amblyopia (7.0%), and amblyopia risk (14.4%). A majority (65.0%) of those examined received prescription spectacles from UCI EyeMobile, with around a third requiring a new or updated prescription. The frequency of REs and amblyopia and the spectacle prescription rate were uniform across OC congressional districts. Myopia and amblyopia risk was positively and negatively associated with household income, respectively. The UCI EyeMobile for Children serves as a vital vision care program, providing free vision screening, comprehensive eye examinations, and spectacles. A significant number of children required examination, and a high frequency of REs and amblyopia were detected in examined children, with subsequent provision of prescription spectacles to most children.

Comparison of ocular pathologies between children attending rural and urban schools in south india: A retrospective analysis

Aims: To assess the differences in ocular morbidity with/without visual impairment between rural and urban school-going children using a two-step screening strategy. Methods: Data obtained by a hospital team from school camps conducted between the 1st of February 2019 and the 31st of December 2019, in schools with a strength of at least 1,000 students were reviewed retrospectively. The differences in ocular pathologies between the rural and urban cohorts were evaluated. A P < 0.05 was considered significant. Results: Out of 25,132 students (nurban = 12,562; nrural = 12,570), 14.44% (nurban = 1,585; nrural = 2,044; P < 0.001) were selected for evaluation by the hospital team after a primary screening by their class teachers. A statistically significant difference was noted in the frequency of refractive errors (urban = 6.8%; rural = 6.0%; P = 0.01), allergic conjunctivitis (urban = 0.2%; rural = 0.05%; P = 0.001), and amblyopia (urban = 0.03%; rural = 0.12%; P = 0.009) between urban and rural children. Simple and compound myopic astigmatism were significantly more common in urban children (p < 0.001 and 0.03 respectively). There was no significant difference in the incidence of spectacle use (P = 0.11) between the two cohorts. A Cochran--Armitage trend test revealed a statistically significant increase in the proportion of myopia with age among the children evaluated by the hospital team (p < 0.001). Conclusion: Allergic eye disease and myopic astigmatism are commoner in urban children. Routine ophthalmic screening is required to identify uncorrected refractive errors and amblyopia, especially in rural school children.

Frequency of Refractive error in children with strabismus at tertiary Care Hospital Gadap Town, Karachi.

Objectives: This was conducted to determine frequency of various refractive errors with types of strabismus among the age group of 5-15 years children visited in the tertiary eye care hospital Gadap town, Karachi. Study Design: Cross Sectional Analytical Study. Setting: Al-Ibrahim Eye Hospital. Period: May 2019 to November 2019. Material &amp; Methods: This study was conducted on 300 strabismic subjects with a mean age of 5 to 15 years by non-probability convenience sampling. All respondents underwent visual acuity assessment by Snellen chart with and without correction, pinhole method, and fundus examination by retinoscope, Cardiff card, cover/uncover test, cycloplegic refraction by cyclopentolate 1%, and ocular movement examination. Results: Out of 300 patients, 43(14.3%) subjects were diagnosed as strabismus with refractive error. 20(46.5%) were boys, while 23(53.5%) were girls with a mean age of 9.62 ± 3.1. The hyperopic 20(46.5 %), 17(39.6 %) myopic, and 6(13.9%) had astigmatism. Conclusion: Strabismus was more frequently observed in females than in males. Hyperopia was in Strabismic respondents than myopic and astigmatism. The esotropia was commonly seen in hypermetropia, Exotropia, in Myopia. The vertical and alternate not frequently seen are these respondents. Hence it is necessary to diagnose the children as early as possible to prevent them from other ocular manifestations.

Evaluation of refractive errors in retinopathy of prematurity screening.

Aim To evaluate the frequency of refractive errors in premature children in retinopathy of prematurity (ROP) screening to find mutual connection of the prematurity level, disease activity and refractive errors. Methods A retrospective study was conducted in the Eye Clinic of the University Clinical Centre Sarajevo, between December 2013 and January 2017. A total of 126 patients of gestational age ≤ 34 weeks and birth weight ≤ 2000 g underwent ROP screening program. The patients were divided into three groups: patients without ROP (n=15), patients with spontaneous regression (n=106) and those with active form of ROP (n=5). Results There were 68 (54.0%) patients with refractive errors: 45 (35.7%) had hyperopia, 17 (13.5%) myopia and six (4.8%) astigmatism. There were three (60.0%) patients with an active form of ROP who had refractive errors: two (40.0%) had myopia and one (20.0%) hyperopia. The group without active ROP had hyperopia as most frequent refractive error, with 10 (66.7%) patients. The average birth weight of the patients without refractive errors was 1403.9±43.4 g compared to 1390.3±104.2 g of the patients with refractive errors (p=0.498). The average gestational age was 29.7±0.3 weeks in patients without and 29.0 ± 0.3 weeks in patients with refractive errors (p=0.126). Conclusion The birth weight and the gestational age were significantly lower in patients with the active form of ROP. Lower gestational age and birth weight of premature children increase the chance for the development of refractive errors such as hyperopia in all premature children and myopia in patients with active form of ROP.

Frequency of refractive errors and binocular vision anomalies in children with learning disability

SummaryPurposeTo determine the frequency of refractive errors and binocular vision anomalies in children with learning disability.MethodsIn a cross‐sectional study, 406 children with learning disability were selected by systematic sampling from the clinic of psychiatry, Emam Hosein hospital, Tehran, Iran. The mean age of the children was 8.56 ± 2.40 years (range: 5.00–14.00 years). After excluding the subjects with history of eye surgery and including criterias, examinations were carried out by experienced optometrist. Ophthalmic tests included: cycloplegic autorefraction, visual acuity, cover test, amplitude of accommodation, near point of convergence and stereopsis. Myopia and hyperopia were defined as spherical equivalent less than −0.50 Diopter (D) and more than +1.00 D. respectively. Astigmatism was defined as cylinder power worse than 0.75 D.ResultsThe frequency of myopia, hyperopia and astigmatism were 14.50%, 6.90% and 18.50% in children with learning diability respectively. Esophoria and exophoria were found in 1.00% and 6.40% of the children respectively. The optimal visual acuity was found in 98.50 % of the subjects.The frequency of exotropia, esotropia and cyclotropia were found in 1.50%, 1.00% and 0.20 % respectively. Suppression was found in 2.20% of the children. The means amplitude of accommodation and near point of accommodation were 15.53 diopter and 10.12 cm in these subjects, respectively.ConclusionsThe results of this study indicated that the frequency of refractive errors and binocular vision anomalies in children with learning disabilities are similar to normal children and are not the main causes of learning disability.

A clinic-based study of refractive errors, strabismus, and amblyopia in pediatric age-group.

Purpose:The purpose of this cross-sectional observational study was to determine the distribution and patterns of refractive errors, strabismus, and amblyopia in children seen at a pediatric eye care.Materials and Methods:The study was conducted in a Private Hospital in Dammam, Kingdom of Saudi Arabia, from March to July 2013. During this period, a total of 1350 children, aged 1–15 years were seen at this Center's Pediatric Ophthalmology Unit. All the children underwent complete ophthalmic examination with cycloplegic refraction.Results:Refractive errors accounted for 44.4% of the cases, the predominant refractive error being hypermetropia which represented 83%. Strabismus and amblyopia were present in 38% and 9.1% of children, respectively.Conclusions:In this clinic-based study, the focus was on the frequency of refractive errors, strabismus, and amblyopia which were considerably high. Hypermetropia was the predominant refractive error in contrast to other studies in which myopia was more common. This could be attributed to the criteria for sample selection since it was clinic-based rather than a population-based study. However, it is important to promote public education on the significance of early detection of refractive errors, and have periodic screening in schools.

The Frequency of Refractive Errors in the Eyes of the First Grade Primary Students in Ankara Province

Aim The aim of this study is to identify the frequency of refractive errors in the eyes of the students starting the primary school in Ankara Province. Method In this cross-sectional study, cluster sampling method was used. The study was conducted on 1513 students in 18 primary schools in Ankara Province in October 2013. First of all, a vision screening test with the E chart was done to the students and then a ophthalmologic examination was performed by an ophthalmologist. The statistical analyses were …

Refractive Correction In A Selected Adult Population In Isiala Ngwa

This study was carried out to determine the types, distribution and frequency of refractive errors in adults in Isiala Ngwa South L.G.A. A 3-day vision screening program was carried out in November 2007 in which three hundred and forty two adults aged 40 to 80 years were screened for pathological conditions.The mean age was 57.8±3.58years. Two hundred and three females and 139 males were screened and refracted. Prevalence ofmyopia, hyperopia and astigmatismfound were 7.20%, 80.30%and 3.50%respectively. Emmetropes were foundto be 9.07%. Themost prevalent refractive error was hyperopia (80.30%). The occupations of the population screened were found to be mainly farming (47.95%), followed by civil service (15.20%) and trading (11.98%). The most prevalent age group in the populationwas 51-55years (26%). Keywords: Vision screening,myopia, hyperopia, astigmatism, presbyopia, community eye health.

Erros de refração como causas de baixa visual em crianças da rede de escolas públicas da regional de Botucatu - SP

To evaluate the refractive errors as cause of visual impairment in school children from the Botucatu region. A sectional study was conducted evaluating preschool and elementary school students, according to gender, refractive error, visual acuity and treatment. Four thousand six hundred and twenty-three (4,623) children were submitted to visual acuity evaluation and 8.1% of them were submitted to complete ocular examination. There were 63.2% hyperopic astigmatism, 15.7% myopic astigmatism, 12.5% astigmatism, 4.9% hyperopia and 3.7% myopia. Corrective lenses were prescribed for 48.7% of the evaluated children. The most frequent refractive error was hyperopic astigmatism and 50% of the children received treatment. The frequency of refractive errors was 3.9% of the studied population.

Prevalence of myopia and myopic progression in a population of clinical microscopists.

The frequency of refractive errors in a population of clinical microscopists is presented. The prevalence of myopia in this population (N = 251) was found to be 71%, with 49% of the population reporting onset or progression of myopia after entry into clinical microscopy (after 21 years of age). Of subjects undergoing renewed progression of an existing myopia since starting clinical microscopy, 56% reported no refractive change for the 5 years before entering their profession. Accuracy of reporting refractive changes was found to be high. No differences were found in task-related functions between those subjects reporting myopic change in adulthood from those who did not report myopic change.