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Ophthalmic Epidemiology

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https://www.readbyqxmd.com/read/29883243/trends-in-cataract-surgical-rate-and-resource-utilisation-in-egypt
#1
Islam Elbieh, Covadonga Bascaran, Karl Blanchet, Allen Foster
PURPOSE: To describe cataract services in Egypt and explore resources and practices in public and private sectors. METHODS: The study was conducted between June and August 2015. All facilities in the country providing cataract services were contacted to obtain information on surgeries performed in 2014. Hospitals performing eye surgery in Quena, Sharkia, and Fayoum regions were visited and a questionnaire on resources for cataract surgery was completed. RESULTS: Cataract surgery was offered in the public sector by 64 government and 16 university teaching hospitals and in the private sector by 101 hospitals...
June 8, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29842804/the-prevalence-and-risk-factors-of-visual-impairment-among-rural-residents-aged-50-years-and-above-in-yugan-county-china
#2
Shaohui Gan, Xiaojun Zhou, Jingzhen Yan, Xiaojun Liu, Jinglin Yi, Xueqing Zhou, Denglai Liu, Qinghong Xie, Jiacheng Geng, Yuanan Lu
PURPOSE: The purpose of the study is to assess the prevalence of visual impairment (PVI) among rural residents aged 50 years and above in Yugan county, China. Researchers analyzed risk factors and obtained scientific baseline information for blindness prevention and control. METHODS: Stratified cluster random sampling was used in randomly selecting 5540 rural residents aged ≥50 in Yugan county. Eligible residents were invited to receive visual acuity measurement via ophthalmic examinations...
May 29, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29726724/epidemiology-of-behcet-s-disease-in-taiwan-a-population-based-study
#3
Yu-Hao Lin, Tzu-Yang Tai, Cheng-Yun Pu, De-Kuang Hwang, Yu-Mei Chung, Yiing-Jeng Chou
PURPOSE: To study the incidence and epidemiology of Behcet's disease in Taiwan. METHODS: This retrospective cohort study was conducted using the nationwide reimbursement database in Taiwan. One million registered beneficiaries of the Taiwan National Health Insurance system in 2000 were randomly selected. All medical claims of these persons were collected. The definition of having Behcet's disease was based on diagnostic codes. Persons who had incomplete registry data or diagnoses prior to 2001 were excluded...
May 4, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29718751/regression-discontinuity-and-randomized-controlled-trial-estimates-an-application-to-the-mycotic-ulcer-treatment-trials
#4
Catherine E Oldenburg, N Venkatesh Prajna, Tiruvengada Krishnan, Revathi Rajaraman, Muthiah Srinivasan, Kathryn J Ray, Kieran S O'Brien, M Maria Glymour, Travis C Porco, Nisha R Acharya, Jennifer Rose-Nussbaumer, Thomas M Lietman
PURPOSE: We compare results from regression discontinuity (RD) analysis to primary results of a randomized controlled trial (RCT) utilizing data from two contemporaneous RCTs for treatment of fungal corneal ulcers. METHODS: Patients were enrolled in the Mycotic Ulcer Treatment Trials I and II (MUTT I & MUTT II) based on baseline visual acuity: patients with acuity ≤ 20/400 (logMAR 1.3) enrolled in MUTT I, and >20/400 in MUTT II. MUTT I investigated the effect of topical natamycin versus voriconazole on best spectacle-corrected visual acuity...
May 2, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29580152/epidemiology-risk-factors-and-clinical-outcomes-in-severe-microbial-keratitis-in-south-india
#5
Jaya Devi Chidambaram, Namperumalsamy Venkatesh Prajna, Palepu Srikanthi, Shruti Lanjewar, Manisha Shah, Shanmugam Elakkiya, Prajna Lalitha, Matthew J Burton
PURPOSE: Here, we report risk factors associated with outcome in severe bacterial keratitis (BK), fungal keratitis (FK), and Acanthamoeba keratitis (AK) in India. METHODS: Prospective observational cohort study conducted in Aravind Eye Hospital, India. Adults presenting with severe microbial keratitis (MK) were enrolled (size ≥3 mm) and followed to 21 days post-enrolment. Ulcer clinical features were recorded at presentation. Outcomes by final visit were classified as good (completely healed or reduced infiltrate size) or poor (enlarged infiltrate size, perforated, or surgery performed)...
March 26, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29580111/the-african-american-eye-disease-study-design-and-methods
#6
Roberta McKean-Cowdin, Alicia Fairbrother-Crisp, Mina Torres, Carlos Lastra, Farzana Choudhury, Xuejuan Jiang, Bruce Burkemper, Rohit Varma
PURPOSE: To describe the study design, operational and recruitment strategies, procedures, and baseline characteristics of the African American Eye Disease Study (AFEDS), a population-based assement of the prevalence of visual impairment, ocular disease, visual function, and health-related quality of life in African Americans. METHODS: This population-based, cross-sectional study included over 6000 African Americans 40 years and older residing in and around Inglewood, California...
March 26, 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29336690/advanced-glaucoma-at-presentation-is-associated-with-poor-follow-up-among-glaucoma-patients-attending-a-tertiary-eye-facility-in-southern-nigeria
#7
Rita Omoso Momoh, Catey Bunce, Gregrey Agbonvihele Oko-Oboh, Clare E Gilbert
PURPOSE: Globally, particularly in Africa, poor compliance with medication is a major problem in glaucoma management but little is known about follow-up rates among African glaucoma patients. The aim of this study was to determine rates of follow-up among glaucoma patients attending a tertiary hospital in southern Nigeria and investigate predictors of poor follow-up. METHODS: Data were extracted from medical records of new glaucoma patients who attended the hospital between June 2011 and May 2013...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29333897/adherence-to-the-american-diabetes-association-retinal-screening-guidelines-for-population-with-diabetes-in-the-united-states
#8
JaeJin An, Fang Niu, Adam Turpcu, Yamina Rajput, T Craig Cheetham
PURPOSE: (1) To assess long-term adherence to American Diabetes Association guideline-recommended retinal screening among population with diabetes in the United States. (2) To determine factors associated with long-term adherence to routine eye screening exams. METHODS: A retrospective cohort study was conducted in adult patients with diabetes identified from January 2009 to December 2010. Patients were followed until disenrollment, death, or study end date (December 2013)...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29281362/types-of-lamp-for-homework-and-myopia-among-chinese-school-aged-children
#9
Chen-Wei Pan, Rong-Kun Wu, Hu Liu, Jun Li, Hua Zhong
PURPOSE: We aim to determine the association of the types of lamp for homework including incandescent lamp, fluorescent lamp, and light-emitting diode (LED) lamp with the prevalence of myopia in Chinese children. METHODS: 2346 grade 7 students from ten middle schools (93.5% response rate) aged 13 to 14 years in Mojiang, a small county located in Southwestern China, participated in the study. Refractive error was measured with cycloplegia using an autorefractor by optometrists or trained technicians...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29281342/a-population-based-survey-of-visual-impairment-and-its-correlates-in-mahabubnagar-district-telangana-state-india
#10
Islay Mactaggart, Sarah Polack, Gvs Murthy, Hannah Kuper
PURPOSE: To estimate the prevalence and correlates of visual impairment in Mahabubnagar district, Telangana, India. METHODS: Fifty-one clusters of 80 people (all ages) were sampled with probability proportionate to size. Households within clusters were selected through the compact segment sampling. Visual acuity (VA) was measured with a tumbling "E" chart. An Ophthalmic Assistant or Vision Technician examined people with VA<6/12 in either eye. Other impairments (hearing, physical) were clinically assessed and self-reported functional difficulties measured using the Washington Group Extended Set...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29281316/retinal-microvascular-signs-and-incidence-of-abdominal-aortic-aneurysm-the-atherosclerosis-risk-in-communities-study
#11
Aaron R Folsom, Pamela L Lutsey, Ronald Klein, Barbara E Klein, Weihong Tang
PURPOSE: To test the hypothesis that retinal microvascular abnormalities known to predict other cardiovascular diseases are associated prospectively with risk of abdominal aortic aneurysm. The rationale is that aortic aneurysm involves small vessel pathology that parallels, to some degree, retinal vasculopathy. METHODS: In 1993-1995, the Atherosclerosis Risk in Communities (ARIC) Study, a prospective population-based cohort, took retinal photographs of a randomly selected eye of 10,911 ARIC participants (initial mean age 60 years)...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29190171/associations-with-retinal-vascular-occlusions-in-a-diverse-urban-population
#12
Eric J Schwaber, Nia Fogelman, Ethan K Sobol, Devi Mehrotra, Jonathan A Powell, Umar Mian, David C Gritz
PURPOSE: Retinal vascular occlusions can lead to sudden and permanent visual impairment or blindness. Few epidemiological studies on retinal vascular occlusions have been conducted, especially on diverse populations. METHODS: This is a retrospective case-control study of all incident retinal vascular occlusions occurring during a three and one-half year study period at Montefiore Medical Center, capturing all potential cases by diagnosis codes. Patients with retinal venous occlusions (RVO) and retinal arterial occlusions (RAO) were analyzed separately and compared to age-matched control groups...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29185814/pupil-dilation-may-affect-retinal-vessel-caliber-measures
#13
Jie Jin Wang, Yuan Shi, Jing Xie, Ava G Tan, Lauren Ab Hogdson, Sharon Lee, Meredith Wickens, Victoria F Cosatto, Kristina Kairaitis, Richard Lindley, Lyndell L Lim, Paul Mitchell, John R Wheatley, Terence C Amis
PURPOSE: To assess the effect of pupil dilation on measures of retinal vessel caliber. DESIGN: Observational study with self-comparisons Methods: Retinal photographs were taken for both eyes of 25 subjects before and after pupil dilation. Three photographic graders, masked to pupil dilation status, measured the same set of images using a computer-assisted, semi-automatic method. We compared means (standard deviations) of retinal arteriolar caliber equivalent (CRAE) and retinal venular caliber equivalent (CRVE) of the same eyes between pre- and post-dilation images...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29182463/willingness-to-pay-for-cataract-surgery-is-much-lower-than-actual-costs-in-zamfara-state-northern-nigeria
#14
Nazaradden Ibrahim, Jacqueline Ramke, Francisco Pozo-Martin, Clare E Gilbert
PURPOSE: Direct medical and non-medical costs incurred by those undergoing subsidised cataract surgery at Gusau eye clinic, Zamfara state, were recently determined. The aim of this study was to assess the willingness to pay for cataract surgery among adults with severe visual impairment or blindness from cataract in rural Zamfara and to compare this to actual costs. METHODS: In three rural villages served by Gusau eye clinic, key informants helped identify 80 adults with bilateral severe visual impairment or blindness (<6/60), with cataract being the cause in at least one eye...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29182452/exome-array-analysis-of-nuclear-lens-opacity
#15
Stephanie J Loomis, Alison P Klein, Kristine E Lee, Fei Chen, Samantha Bomotti, Barbara Truitt, Sudha K Iyengar, Ronald Klein, Barbara E K Klein, Priya Duggal
PURPOSE: Nuclear cataract is the most common subtype of age-related cataract, the leading cause of blindness worldwide. It results from advanced nuclear sclerosis, or opacity in the center of the optic lens, and is affected by both genetic and environmental risk factors, including smoking. We sought to understand the genetic factors associated with nuclear sclerosis through interrogation of rare and low frequency coding variants using exome array data. METHODS: We analyzed Illumina Human Exome Array data for 1,488 participants of European ancestry in the Beaver Dam Eye Study who were without cataract surgery for association with nuclear sclerosis grade, controlling for age and sex...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29172840/the-influence-of-oral-statin-medications-on-progression-of-glaucomatous-visual-field-loss-a-propensity-score-analysis
#16
Ben Whigham, Eugene Z Oddone, Sandra Woolson, Cynthia Coffman, R Rand Allingham, Christine Shieh, Kelly W Muir
PURPOSE: The purpose of this study was to examine the association between oral statin use and the progression of open angle glaucoma. METHODS: Medical records of 847 Veterans were reviewed to collect statin use history, record demographic and comorbid medical conditions, and review visual fields. Visual field progression was judged by an ophthalmologist masked to statin use history. Progression rates in a propensity score matched cohort were compared between statin users and nonusers using McNemar's test with the propensity model derived using associated medical and demographic factors...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29140735/factors-associated-with-visual-acuity-in-patients-with-cystoid-macular-oedema-and-retinitis-pigmentosa
#17
Gerald Liew, Anthony T Moore, Patrick D Bradley, Andrew R Webster, Michel Michaelides
PURPOSE: Retinitis pigmentosa is the most common inherited retinal dystrophy. The factors associated with visual acuity in patients with other retinal diseases are well known, but are poorly understood in patients with retinitis pigmentosa. This knowledge is useful for prognosis and to support secondary endpoints in clinical trials. METHODS: We conducted a cross-sectional study of consecutive patients recruited from the inherited retinal disease service from January 2012 to December 2012...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29125374/interventions-to-improve-utilization-of-cataract-surgical-services-by-girls-case-studies-from-asia-and-africa
#18
Priya Adhisesha Reddy, Elizabeth A Kishiki, Hari Bahadur Thapa, Lisa Demers, Robert Geneau, Ken Bassett
PURPOSE: Gender and blindness initiatives continue to make eye care personnel aware of the service utilization inequity strongly favouring men, yet interventions to reduce that inequity, particularly for girls, are under developed. METHODS: This descriptive study gathered quantitative data on the degree of gender equity at five Child Eye Health Tertiary Facilities (CEHTFs) in Asia and Africa and conducted in-depth interviews with eye care personnel to assess their strategies and capacity to reduce gender inequity...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/28990827/ural-eye-and-medical-study-description-of-study-design-and-methodology
#19
Mukharram Bikbov, Rinat R Fayzrakhmanov, Gyulli Kazakbaeva, Jost B Jonas
PURPOSE: Since there is a scarcity on population-based health information available for Russia, we conducted this project to assess the prevalence of major ocular and systemic disorders and their associated risk factors. METHODS: A population-based cross-sectional study (Ural Eye and Medical Study (UEMS)) was performed in Bashkortostan 1300 km east of Moscow. The sampling frame consisted of all inhabitants aged over 40 years and living in an urban study area in the capital city Ufa and a rural region at 65 km outside of Ufa...
June 2018: Ophthalmic Epidemiology
https://www.readbyqxmd.com/read/29561207/prevalence-of-blindness-and-low-vision-in-iran-a-systematic-review-and-meta-analysis
#20
Mahdi Afshari, Mahmood Moosazadeh, Saeed Barzegari, Ehsan Abedini, Seyedeh Sakineh Salimi
PURPOSE: Visual impairment is responsible for medical, mental, and socio-economic problems. Several studies have investigated the prevalence of blindness and low vision in different parts of Iran. This study aims to estimate the pooled results of these studies to estimate the total prevalence of this problem in Iran. METHODS: National and international databases were searched using specific keywords. The selected primary studies were quality assessed using STROBE checklist...
March 21, 2018: Ophthalmic Epidemiology
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