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Hamidi A, Jalalifar S, Atigh SBQ, Darvishi A, Sharif NM, Lashkardoost H, Sangsefidi N, Shandiz JH. The prevalence of functional amblyopia and its related risk factors in preschool children in North-Eastern Iran. Oman J Ophthalmol 2024; 17:59-64. [PMID: 38524325 PMCID: PMC10957057 DOI: 10.4103/ojo.ojo_295_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 03/26/2024] Open
Abstract
BACKGROUND Purpose was to determine the prevalence of amblyopia and its related risk factors in children aged 3-6 years in Bojnurd, north-eastern Iran. MATERIALS AND METHODS In this cross-sectional study, from 12,331 children aged 3-6 in Bojnurd, 6600 children participated in annual amblyopic screening program and among them, around 1100 suspected cases were referred for full ophthalmic examinations. Measurement of visual acuity, cycloplegic refraction, subjective refraction, and cover test were performed for all participants. Amblyopia was defined as CDVA of 0.2 LogMar or less in each eye or 2-line difference or more in best-corrected visual acuity between two eyes. RESULTS The prevalence of amblyopia was estimated 0.95% (95% confidence interval [CI]: 0.73%-1.2%). There was no relationship between amblyopia with age and genders. Most amblyopic children were hyperopic (61.9%; 95% CI: 48.7-73.8). Strabismus was found in 17.4% of amblyopic patients (95% CI: 9.05%-29.09%). Approximately half of the amblyopic children were anisometropic (55.5%; 95% CI: 42.40%-68.08%). The most common type of amblyopia was anisohyperopic (55.56%; 95% CI: 42.5%-67.5%). The prevalence of bilateral amblyopia was more than unilateral amblyopia. The assessment of data showed that hyperopia, astigmatism, and anisometropia were the most common causes of amblyopia in this study. CONCLUSIONS The prevalence of amblyopia was estimated about 1% in north-eastern Iran. Our study indicated a valuable information around the effect of refractive error and anisometropia on amblyopia which could be helpful in designing a comprehensive vision screening program for preschool children.
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Affiliation(s)
- Aghdas Hamidi
- Department of Optometry, School of Paramedical Science, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Samira Jalalifar
- Department of Surgery, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Somayyeh Boomi Quchan Atigh
- Department of Optometry, School of Paramedical Science, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Azam Darvishi
- Department of Optometry, School of Paramedical Science, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Nasrin Moghadas Sharif
- Department of Optometry, School of Paramedical Science, Mashhad University of Medical Sciences, Mashhad, Iran
- Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hossein Lashkardoost
- Department of Public Health, School of Public Health, North Khorasan University of Medical Sciences, Bojnurd, Iran
| | - Negar Sangsefidi
- Department of Biostatistics, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Javad Heravian Shandiz
- Department of Optometry, School of Paramedical Science, Mashhad University of Medical Sciences, Mashhad, Iran
- Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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Maraghechi G, Ojaghi H, Amani F, Najafi A. A comparative study of Pentacam indices in various types and severities of refractive error in candidates for photorefractive keratectomy (PRK) surgery. J Med Life 2022; 15:810-818. [PMID: 35928358 PMCID: PMC9321500 DOI: 10.25122/jml-2021-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 12/13/2021] [Indexed: 11/12/2022] Open
Abstract
This study aimed to specify Pentacam indices in patients who suffered from different types of refractive error and underwent photorefractive keratectomy (PRK) surgery. It is a descriptive cross-sectional study carried out on 1125 patients (2215 eye samples) who underwent PRK surgery in the Noor Surgical Center of Ardabil, Iran, over a 5 year period (2014-2018). A particular checklist was provided to patients, which consisted of demographic data, pachymetry test, keratometry, refractive error, corneal-thickness indices, and corneal surface area indices. The data were analysed using the statistical analysis package of IBM® V25. The mean age of the participants in this study was 28.48±6.82 years, and the ratio of women to men was 66.4%. It was observed that the differences between angle, volume, the depth of the anterior chamber, IVA, and ISV were significant (P=0.00) when compared to each other in all types of refractive errors. High myopes had significantly higher Kmax front than low myopes (P=0.00). In astigmatism patients, the Kmax in front of the cornea in extreme type was significantly higher than in moderate (P=0.00) and high (P=0.01) types. High myopes had significantly lower Rmin than mild myopes (P=0.02), and extreme astigmatism had significantly lower Rmin than high (P=0.014) and moderate types (P=0.013). The data from this study revealed that in patients undergoing PRK surgery, some Pentacam indices could be related to some types of refractive error, and in some of these indices, there are statistically significant differences between different severities of refractive errors. Therefore, their preoperative evaluation is very important.
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Affiliation(s)
- Ghazal Maraghechi
- Department of Medical Education, School of Medicine, Ardabil Azad University, Ardabil, Iran
| | - Habib Ojaghi
- Department of Surgery, School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran,Corresponding Author: Habib Ojaghi, Department of Surgery, School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran. E-mail:
| | - Firouz Amani
- Department of Community Medicine, School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Amin Najafi
- Department of Surgery, School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran
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Shahin B, Ojaghi H, Amani F. One-year follow-up of patients with hyperopia undergoing photorefractive keratectomy with Allegretto WaveLight Eye Q 400. J Med Life 2022; 15:489-498. [PMID: 35646175 PMCID: PMC9126459 DOI: 10.25122/jml-2021-0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 11/15/2021] [Indexed: 11/19/2022] Open
Abstract
This study aimed to examine the effectiveness of photorefractive keratectomy (PRK) in treating patients with cycloplegic hyperopia from +1.00 to +7.00 diopter using Allegretto wave Eye Q 400. This study was conducted on 25 patients with cycloplegic astigmatism ≤1 diopter and cycloplegic hyperopia between +1.00 and +7.00 diopters in 47 eyes, who successively entered into the study within 6 months and underwent PRK. Prior to PRK surgery, all the patients were examined for cycloplegic refraction (astigmatism and hyperopia), slit lamp, keratometry, fundus, and best-corrected (BCVA) and uncorrected visual acuity (UCVA) testing. These examinations were repeated after 1 week, 1 month, 3 months, 6 months, and 1 year postoperatively. The mean preop UCVA of patients was 0.76±0.28 (ranging from 0.00 to 1.3), which reached 0.19±0.22 (ranging from 0.00 to 0.78) one year after the surgery (P=0.000). There was a significant correlation between increasing astigmatism and preop cycloplegic hyperopia >5 diopters (P=0.000), corneal ring haziness at 12th months (P=0.000), and 12 months cycloplegic residual hyperopia ≥2.00 diopters (P=0.000). 53.2% of the eyes (with a mean grade of 2.34) were detected with corneal ring haziness at 12th months, which was significantly correlated with 12 months residual cycloplegic hyperopia of ≥2.00 diopters (P: 0.000) and cycloplegic sphere above 5 diopters (P=0.006). Although the use of photorefractive keratectomy (PRK) with Allegretto Eye Q 400 is associated with a decrease in the mean cycloplegic and improved UCVA and BCVA, its use is not recommended in cases with preop cycloplegic hyperopia above 5 diopters due to the high rate of induction of astigmatism, corneal haziness, and regression of hyperopia.
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Affiliation(s)
- Behrad Shahin
- Department of Community Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Habib Ojaghi
- Department of Surgery, Ardabil University of Medical Sciences, Ardabil, Iran,Corresponding Author: Habib Ojaghi, Department of Surgery, Ardabil University of Medical Sciences, Ardabil, Iran. E-mail:
| | - Firouz Amani
- Department of Community Medicine, Ardabil University of Medical Sciences, Ardabil, Iran
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Hu B, Liu Z, Zhao J, Zeng L, Hao G, Shui D, Mao K. The Global Prevalence of Amblyopia in Children: A Systematic Review and Meta-Analysis. Front Pediatr 2022; 10:819998. [PMID: 35601430 PMCID: PMC9114436 DOI: 10.3389/fped.2022.819998] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 03/15/2022] [Indexed: 01/15/2023] Open
Abstract
Epidemiological data about the prevalence of amblyopia around the world vary widely among regions and periods. This meta-analysis aimed to determine the global prevalence of amblyopia in children. PubMed, Embase, and the Cochrane Library were searched for prevalence studies published up to 5 November 2021. The outcome was the prevalence of amblyopia, analyzed as pooled estimates with 95% confidence intervals (CI). A total of 97 studies were included, including 4,645,274 children and 7,706 patients with amblyopia. The overall worldwide pooled prevalence of amblyopia was 1.36% (95%CI: 1.27-1.46%). The prevalence of amblyopia was higher in males (1.40%, 95%CI: 1.10-1.70%) than in females (1.24%, 95%CI: 0.94-1.54%) (OR = 0.885, 95%CI: 0.795-0.985, P = 0.025). The results of the meta-regression analysis showed that there were no significant associations between the prevalence of amblyopia and geographical area, publication year, age, sample size, and whether it was carried out in a developed or developing country (all P > 0.05). Begg's test (P = 0.065) and Egger's test (P < 0.001) showed that there was a significant publication bias in the prevalence of amblyopia. In conclusion, amblyopia is a significant vision problem worldwide, and public health strategies of early screening, treatment, and management are important.
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Affiliation(s)
- Budan Hu
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Zongshun Liu
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Jiao Zhao
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Li Zeng
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Gengsheng Hao
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Dan Shui
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
| | - Ke Mao
- Department of Ophthalmology, The People's Hospital of Leshan, Leshan, China
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Lourenço L, Luís S. Musculoskeletal Disorders in Portuguese Welders: Effects on Bodily Pain and Health-Related Quality of Life. Front Public Health 2021; 9:660451. [PMID: 34095065 PMCID: PMC8173066 DOI: 10.3389/fpubh.2021.660451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 04/08/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Musculoskeletal disorders in welders may influence their health-related quality of life. However, few studies have addressed this issue and their results were inconclusive. This study investigates whether there are musculoskeletal disorders with a higher incidence in welders compared to non-welders, and whether these disorders lead to an increase in bodily pain which in turn decreases their health-related quality of life. Methods:A priori analyses of statistical power were conducted to determine the sample size needed to find medium to large statistical effects, for a 0.05 alpha, and critical sampling, combined with snowball sampling, was carried out. The study was cross-sectional, and participants were asked to respond to a survey using validated instruments (Nwelders = 40, Nnon-welders = 42). Results: As expected, a higher incidence of symptoms of musculoskeletal disorders in the cervical, dorsal, lumbar, and wrists and hands was found in welders in comparison to non-welders. Furthermore, the presence of musculoskeletal disorders, particularly in the lumbar area, was related to an increased bodily pain and decreased health-related quality of life. Conclusion: Welders are exposed to a higher incidence of musculoskeletal disorders that decrease their quality of life. It is essential to increase the awareness of welders, organizations, and regulatory institutions toward this issue in order to motivate the development and implementation of prevention strategies. The need for primary and secondary prevention-type strategies, which have already proven their effectiveness in the context of welding, is highlighted.
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Affiliation(s)
| | - Sílvia Luís
- Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, Faro, Portugal
- Centro de Administração e Políticas Públicas, Instituto Superior de Ciências Sociais e Políticas, Universidade de Lisboa, Lisboa, Portugal
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Maraghechi G, Ojaghi H, Amani F, Moghadam TZ. Pentacam Indices in Photorefractive Keratectomy Surgery. J Med Life 2021; 13:523-529. [PMID: 33456601 PMCID: PMC7803299 DOI: 10.25122/jml-2020-0057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Refractive eye surgeries are one of the most non-emergent ophthalmic surgeries due to the effect on the reduction of refractive errors, increasing visual acuity, enhancing the quality of vision, and indirectly increasing the quality of life of patients. The aim of this study was to determine Pentacam indices in the patients who underwent photorefractive keratectomy (PRK) during 2014-2018, as well as to show their correlation with the type of refractive error. This descriptive cross-sectional study was performed on 2215 eyes of 1125 patients undergoing PRK surgery. The patients’ checklist, including demographic information, refractive index, keratometry, pachymetry, corneal surface zone indices, and progressive corneal thickness indices, was provided. All data were analyzed using the IBM SPSS software, version 25. The findings showed that there was a significant association between posterior corneal astigmatism (PCA) and anterior corneal astigmatism (ACA) (p=0.00). The mean Kmax front was recorded as 44.844 ± 1.58 D, which was significantly correlated with the type of refractive errors (p=0.00). According to the findings, there was a significant relationship between anterior chamber indices and refractive error types and their severity (p=0.00). There was also a significant correlation between the surface zone and keratoconus indices (i.e., index of surface variance - ISV, index of vertical asymmetry - IVA, index of height asymmetry - IHA, and minimum radius of curvature - Rmin) with refractive errors (p=0.00). The findings showed that some of the Pentacam indices could be related to the types of refractive errors in patients undergoing PRK surgery. Therefore, their evaluation is of great importance in this regard.
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Affiliation(s)
| | - Habib Ojaghi
- Department of Surgery, School of Medicine and Allied Medical Sciences, Imam Reza Hospital,Ardabil University of Medical Sciences, Ardabil, Iran
| | - Firouz Amani
- School of Medicine and Allied Medical Sciences, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Telma Zahirian Moghadam
- Social Determinants of Health Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
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Fu Z, Hong H, Su Z, Lou B, Pan CW, Liu H. Global prevalence of amblyopia and disease burden projections through 2040: a systematic review and meta-analysis. Br J Ophthalmol 2019; 104:1164-1170. [DOI: 10.1136/bjophthalmol-2019-314759] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/17/2019] [Accepted: 10/21/2019] [Indexed: 12/11/2022]
Abstract
PurposeAmblyopia is a leading cause of vision impairment among children and young adults. Individual studies showed significant variations in the prevalence of amblyopia in different regions and age groups. This study is to estimate the global prevalence of amblyopia by pooling its prevalence from the previous studies and to project the number of people affected through 2040.MethodsWe performed a systematic review and meta-analysis on the prevalence of amblyopia using data published before 20 October 2018. We estimated the prevalence rate of amblyopia and its 95% CI globally and by subgroups (eg, region and age). The prevalence data were applied to United Nations World Population Prospects to derive the projected number with amblyopia through 2040.ResultsA meta-analysis of 60 studies (1 859 327 subjects) showed that the pooled prevalence rate of amblyopia was 1.44% (95% CI 1.17% to 1.78%). Prevalences in Europe (2.90%) and North America (2.41%) were higher than in Asia (1.09%) and Africa (0.72%). The highest prevalence was found in subjects over 20 years old (3.29%). There was no difference in the prevalence between genders. We estimated 99.2 (95% CI 71.7 to 146.1) million people with amblyopia in 2019 worldwide, increasing to 175.2 (95% CI 81.3 to 307.8) million by 2030 and 221.9 (95% CI 83.7 to 429.2) million by 2040.ConclusionsThe amblyopia is becoming a significant vision problem worldwide. It is of great importance to design and implement amblyopia screening, treatment and related public health strategies.
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Comparison of the pediatric vision screening program in 18 countries across five continents. J Curr Ophthalmol 2019; 31:357-365. [PMID: 31844783 PMCID: PMC6896448 DOI: 10.1016/j.joco.2019.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 07/12/2019] [Accepted: 07/24/2019] [Indexed: 01/25/2023] Open
Abstract
Purpose Incorporating mass pediatric vision screening programs as part of a national agenda can be challenging. This review assessed the implementation strategy of the existing pediatric vision screening program. Methods A search was performed on PubMed, EBSCO host MEDLINE Complete, and Scopus databases encompassing the past ten years for mass pediatric screening practice patterns that met the selection criteria regarding their objectives and implementation. Results were analyzed from 18 countries across five continents. Results Eight countries (44%) offered screening for distance visual acuity only, where the majority of the countries (88%) used either Snellen or Tumbling E chart. High-income countries initiated screening earlier and applied a more comprehensive approach, targeting conditions other than reduced vision only, compared with middle-income countries. Chart-based testing was most commonly performed, with only three countries incorporating an instrument-based approach. Lack of eyecare and healthcare practitioners frequently necessitated the involvement of non-eyecare personnel (94%) as a vision screener including parent, trained staff, and nurse. Conclusions Implementation of a vision screening program was diverse within countries preceded by limited resources issues. Lack of professional eyecare practitioners implied the need to engage a lay screener. The limitation of existing tests to detect a broader range of visual problems at affordable cost advocated the urgent need for the development of an inexpensive and comprehensive screening tool.
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Damari B, Mahdavi A, Hajian M. How to improve Iranians' vision health: on the national policy of preventing Iranians' blindness. Int J Ophthalmol 2019; 12:114-122. [PMID: 30662850 DOI: 10.18240/ijo.2019.01.18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 11/27/2018] [Indexed: 11/23/2022] Open
Abstract
AIM To review vision health situation of Iranian community, analyze its determinants, and discuss the adopted improvement strategies by the Iran Ministry of Health and Medical Education (MOHME). METHODS This was a rapid situation analysis with a qualitative approach in three parts of recognition, orientation and implementation. The data were gathered via review of upstream documents, national and international experiences, and experts and stakeholders' opinions. RESULTS Eradicating trachoma, increasing human resources, increasing educational and research centers and promotion of ophthalmic technologies were important achievements in the field of vision health in Iran. Through these achievements, it seemed that the pattern of causes of blindness and low vision was similar to that of the developed countries. However, the review of Iranians' vision health indicators showed that a considerable percent of the blindness and low vision was avoidable through a national program demanding 3 types of interventions in social determinants of health (SDH), community education, and increasing the access to health care services by integrating the necessary services in primary health care system. CONCLUSION Managing the issue requires attentions from a national committee for preventing blindness with participation of all stakeholders, implementing a national survey on vision health, preparation of the primary level health centers including employment and education of community health workers (Behvarzes), optometrists and general practitioners, fair distribution of specialized human resources and establishing at least one specialized center in each province for referring patients from the primary levels.
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Affiliation(s)
- Behzad Damari
- Neuroscience Institute, Tehran University of Medical Sciences, Tehran 1416833481, Iran
| | - Alireza Mahdavi
- Ministry of Health and Medical Education, Tehran 1467664961, Iran
| | - Maryam Hajian
- Minimally Invasive Surgery Research Center, Iran University of Medical Sciences, Tehran 1445613113, Iran
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Chegeni M, Khanjani N, Rahmatpour P, Ahmadi Pishkuhi M, Abdolalian N. The prevalence of amblyopia in Iran: A systematic review. J Curr Ophthalmol 2018; 30:194-201. [PMID: 30197947 PMCID: PMC6127360 DOI: 10.1016/j.joco.2018.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 01/07/2018] [Accepted: 02/06/2018] [Indexed: 11/28/2022] Open
Abstract
PURPOSE The aim of this study was to determine the prevalence of amblyopia in the population of Iran. METHODS This article is a systematic review. A comprehensive search was conducted in PubMed, Scopus, Science Direct, Ovid, Web of Science, SID, Magiran, with appropriate terms. Information related to the sample size and the prevalence of amblyopia was extracted and summarized in tables. Analysis was performed using STATA software. RESULTS From 551 articles that were originally extracted from the databases, 31 articles met the criteria for entering the review. These studies were conducted in different regions of Iran. The prevalence of amblyopia in different regions varied between 0.19 and 3.69%. Study results were heterogeneous (I2 = 99.7%), and therefore, a meta-analysis was not done. CONCLUSIONS The prevalence of amblyopia in Iran is very different. In addition to conducting national screenings, it is necessary to report the incidence of amblyopia and its related factors in different parts of the country.
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Affiliation(s)
- Maryam Chegeni
- Department of Epidemiology, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
| | - Narges Khanjani
- Neurology Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Pardis Rahmatpour
- Social Determinants of Health Research Center, Guilan University of Medical Sciences, Rasht, Iran
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Keshavarz K, Angha P, Sayehmiri F, Sayemiri K, Yasemi M. The prevalence of visual disorders in Iranian students: A meta-analysis study and systematic review. Electron Physician 2017; 9:5516-5524. [PMID: 29238492 PMCID: PMC5718856 DOI: 10.19082/5516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 07/12/2017] [Indexed: 11/20/2022] Open
Abstract
Background Visual defects have dramatic effects on health, self-esteem, and educational function of students, and delayed diagnosis will cause complications, like academic failure and psychologic disorders. Objective The present study aimed to investigate the prevalence of ocular disorders in Iranian students in a systematic review. Methods We searched databases, including PubMed, SID, Magiran, Google Scholar, and Iranmedex using the following keywords in Persian and English: disorders, vision, amblyopia, refractive errors, astigmatism, student, and Iran with all the possible combinations, important, chief, and sensitive words. Search resulted in 28 articles, conducted during a period from 1996 to 2014 in Iran and their data was analyzed using meta-analysis and random effects model. Heterogeneity of studies was assessed using I2 index, and data was finally analyzed with R Software and STATA (Version 11.2). Results Total number of subjects in the study was 1,117,274, aged 2 to 18 years. The prevalence of disorders related to amblyopia, refractive error, and strabismus was 8%, 7% and 1%, respectively. The greatest amount of refractive error was related to astigmatism (19%) followed by myopia (17%). Conclusion According to the study results, the prevalence of visual disorders among Iranian students indicated the critical necessity of screening programs for prevention of visual disorders in this age group.
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Affiliation(s)
- Kambiz Keshavarz
- MD, Pediatrician, Assistant Professor of Pediatrics, Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Parvin Angha
- Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Fatemeh Sayehmiri
- PhD, Proteomics Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Kourosh Sayemiri
- PhD of Biological Statistic, Research Center of Prevention of Psychosocial Disorder, Ilam University of Medical Sciences, Ilam, Iran
| | - Masood Yasemi
- MD, Poostchi Ophthalmology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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