Background Refractive error is considered as an important component of the priority disease "childhood blindness" within the Vision 2020' initiative to eliminate avoidable blindness. The large majority of vision impairment in school aged children is due to uncorrected refractive error. Hence, refractive errors are considered as a public health challenge. The aim of this study was to estimate the prevalence of refractive error and spectacle compliance among children in Tokha municipality, Kathmandu. Objective The aim of this study was to estimate the prevalence of refractive error and spectacle compliance among children from Tokha municipality, Kathmandu. Method A descriptive, cross-sectional study was conducted by enrolling 1366 children from Tokha municipality from 1st to 3rd week of April 2022 after obtaining the Institutional Review Board (Reference number:60/2079/80). Assent was taken from all children and informed consent was signed by the legal guardians of the children. All the samples underwent a comprehensive ocular history taking, visual acuity and refraction and ocular health assessments. The inclusion criteria was school going children within age group 5-16 years. Result Out of a total of 1366 samples, 10.91% (149) of the school children were identified to have refractive error. The primary type of refractive error observed was compound myopic astigmatism, which accounted for 52.3% (78) of the cases. A spectacle compliance rate of 72.15% was found. Conclusion Refractive error prevalence in this study is consistent with findings from other part of Nepal. The most common type of refractive error was compound myopic astigmatism. The frequency of refractive errors was notably higher among individuals who frequently use electronic devices, attend private schools, and reside in densely populated areas. It is recommended to organize regular community eye camps and conduct vision screenings to identify and promptly address refractive errors in children.
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Ophthalmic Physiol Opt
January 2025
Faculty of Health, Medicine and Social Care, Medical Technology Research Centre, Anglia Ruskin University, Chelmsford, UK.
Purpose: To investigate the influence of axial length on different ocular parameters and create a predictive tool for refractive error progression.
Methods: Two eye models were used to simulate refractive errors, namely the Liou-Brennan and the Goncharov-Dainty. Both models were simulated using Zemax OpticStudio.
Clin Exp Optom
January 2025
Department of Optometry, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.
Clinical Relevance: The vestibular-ocular reflex stabilises the retinal image and maintains balance during head movement. Astigmatism is one of the common refractive errors that can reduce the quality of visual inputs.
Background: The purpose of this study was to investigate the effect of induced astigmatism on the function of the vestibular-ocular reflex.
Front Med (Lausanne)
December 2024
The Department of Ophthalmology of the First Affiliated Hospital, Gannan Medical University, Ganzhou, Jiangxi, China.
Aim: To quantitatively analyze the relationship between spherical equivalent refraction (SER) and retinal vascular changes in school-age children with refractive error by applying fundus photography combined with artificial intelligence (AI) technology and explore the structural changes in retinal vasculature in these children.
Methods: We conducted a retrospective case-control study, collecting data on 113 cases involving 226 eyes of schoolchildren aged 6-12 years who attended outpatient clinics in our hospital between October 2021 and May 2022. Based on the refractive spherical equivalent refraction, we categorized the participants into four groups: 66 eyes in the low myopia group, 60 eyes in the intermediate myopia group, 50 eyes in the high myopia group, and 50 eyes in the control group.
BMC Ophthalmol
January 2025
Department of Ophthalmology, Eye & ENT Hospital, Fudan University, 83 Fenyang Road, Xuhui District, Shanghai, 200031, China.
Background: To investigate the impact of central corneal astigmatism on postoperative visual outcomes in patients with trifocal intraocular lens (IOL) implantation.
Methods: This retrospective study included 278 eyes of 278 patients who underwent uneventful cataract surgery with implantation of the trifocal IOL (AT LISA tri 839MP). Patients were divided into two groups according to the total corneal refractive power (TCRP) in 3 mm zone centered on the corneal apex: low astigmatism group, TCRP ≤ 0.
BMJ Open
December 2024
Department of Ophthalmology & Clinical Centre of Optometry, Peking University People's Hospital, Beijing, China.
Objectives: To examine the ocular biometric parameters and predict the annual growth rate of the physiological axial length (AL) in Chinese preschool children aged 4-6 years old.
Methods: This retrospective cross-sectional study included 1090 kindergarten students (1090 right eyes) between the ages of 4 and 6 years from Pinggu and Chaoyang District, Beijing. Dioptre values were ascertained following cycloplegic autorefraction.
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