A Population-Based Estimate of Cataract Prevalence: The Melbourne Visual Impairment Project Experience1

2015 ◽  
pp. 1-6 ◽  
Author(s):  
P. M. Livingston ◽  
C. S. Guest ◽  
Y. Stanislavsky ◽  
S. Lee ◽  
S. Bayley ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Population Based

The prevalence and causes of visual impairment in Dariyah, a rural community in Saudi Arabia

2021 ◽  
Vol 80 (1) ◽  
Author(s):  
Waleed Alghamdi ◽  
Godwin O. Ovenseri-Ogbomo
Keyword(s):  
Saudi Arabia ◽  
Visual Impairment ◽  
Rural Community ◽  
Refractive Error ◽  
Population Based ◽  
Vision Impairment ◽  
Health Examination ◽  
Refractive Errors ◽  
Cross Sectional ◽  
Eye Examination

Background: Visual impairment is disproportionately distributed between rural and urban dwellers. Rural dwellers have limited access to the eye care services that are available in urban cities.Aim: The aim of this study was to determine the prevalence and causes of visual impairment in Dariyah, a rural community in the Qassim region, Saudi Arabia.Setting: This research comprised a population-based assessment of the vision and visual status of the inhabitants of Dariyah community.Methods: A cross-sectional descriptive study was conducted amongst the inhabitants of the community of Dariyah. A comprehensive eye examination consisting of visual acuity, ocular health examination, objective and subjective refraction was performed. The examinations were conducted by registered ophthalmologists and optometrists from the Qassim University. Vision impairments were categorised according to the International Classification of Diseases (ICD), Section 9D90, ‘Vision impairment including blindness’ (2018).Results: In all, 68 (24.5%) participants had vision impairment (using the better-seeing eye), with refractive errors being the main cause of vision impairment. Other causes of vision impairment included cataract (20, 7.2%), trichiasis (5, 1.8%) and glaucoma (2, 0.7%). Refractive errors were present in 193 (69.7%), with astigmatism being the commonest refractive error. About 60% of those with refractive errors presented without spectacles for correction, and 20% reported that they had never had an eye examination. Refractive errors could not be determined in 19 (6.9%) of the subjects because of conditions such as matured cataract and other ocular abnormalities.Conclusion: Uncorrected refractive error was found to be the leading cause of vision impairment in this rural community in Saudi Arabia.

Childhood blindness and visual impairment in the Narayani Zone of Nepal: a population-based survey

2019 ◽  
Vol 26 (4) ◽  
pp. 257-263 ◽  
Author(s):  
R. N. Byanju ◽  
Ram Prasad Kandel ◽  
Prasanna Sharma ◽  
Hari Bahadur Thapa ◽  
Manisha Shrestha ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Population Based ◽  
Childhood Blindness ◽  
Population Based Survey

scholarly journals Prevalence and causes of visual impairment in a rural North-east China adult population: a population-based survey in Bin County, Harbin

2009 ◽  
Vol 88 (6) ◽  
pp. 669-674 ◽  
Author(s):  
Wulian Song ◽  
Xian Sun ◽  
Zhengbo Shao ◽  
Xinrong Zhou ◽  
Yang Kang ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Adult Population ◽  
Population Based ◽  
East China ◽  
North East ◽  
Population Based Survey

scholarly journals Leading causes of blindness and visual impairment in the region of Eastern Herzegovina

2006 ◽  
Vol 59 (1-2) ◽  
pp. 15-18 ◽  
Author(s):  
Lala Ceklic ◽  
Slobodanka Latinovic ◽  
Petar Aleksic
Keyword(s):  
Visual Impairment ◽  
Visually Impaired ◽  
Age Distribution ◽  
Epidemiological Studies ◽  
Population Based ◽  
World Health ◽  
Visual Disability ◽  
Common Causes ◽  
Health Organization ◽  
Blind Persons

Introduction. Visual impairment and blindness are serious social and health problems in the world. 1992 classification of visual disorders by World Health Organization has recently been implemented. The goal of this study was to determine common causes of visual impairment and blindness in the region of Eastern Herzegovina. Material and methods. In this population based study we have analyzed medical records stored in the regional Association of Visually Impaired and Blind Persons of the Republic of Srpska (Trebinje, Bileca, Foca, Eastern Sarajevo). The analysis included sex and age distribution of registered population, classification and leading causes of visual disability and blindness. Results. There are 298 registered persons with visual disability and blindness in the region of Eastern Herzegovina and Eastern Sarajevo. The prevalence of visual impairment and blindness in the aforementioned region is 0.1%. Among the studied population, there are more males than females with visual disability or blindness (56% versus 44%). Most (78%) of registered persons are blind, and only 22% are visually impaired. 43% of registered population are in the IV category and only 8.38% are registered in the II category. Only 2% of registered population are children. Common causes of visual disability and blindness in the region of Eastern Herzegovina are: glaucoma (22%), cataract (17%), myopia alta (13%), diabetic retinopathy (12%) and ocular trauma (11%). Common causes of children's visual impairment include: optic nerve anomalies, congenital cataract and premature retinopathy. Discussion and conclusion Compared with literature data, common causes of blindness and visual impairment in the region of Eastern Herzegovina do not differ significantly from those in other regions. Registration is based on the WHO model, but it is possible only by performing active epidemiological studies. .

Poor person and areal socioeconomic status is associated with increased diabetic retinopathy and visual impairment incidence and progression

2020 ◽  
pp. bjophthalmol-2020-316430
Author(s):  
Jin Rong Low ◽  
Alfred Tau Liang Gan ◽  
Eva K Fenwick ◽  
Preeti Gupta ◽  
Tien Y Wong ◽  
...  
Keyword(s):  
Socioeconomic Status ◽  
Diabetic Retinopathy ◽  
Visual Impairment ◽  
Low Socioeconomic Status ◽  
Low Income ◽  
Vision Loss ◽  
Population Based ◽  
Housing Type ◽  
Incidence Risk

BackgroundTo investigate the longitudinal associations between person-level and area-level socioeconomic status (PLSES and ALSES, respectively) with diabetic retinopathy (DR) and visual impairment (VI) in Asians with diabetes mellitus (DM).MethodsIn this population-based cohort study, we included 468 (39.4%) Malays and 721 (60.6%) Indians with DM, with a mean age (SD) of 58.9 (9.1) years; 50.6% were female and the mean follow-up duration was 6.2 (0.9) years. Individual PLSES parameters (education, monthly income and housing type) were quantified using questionnaires. ALSES was assessed using the Socioeconomic Disadvantage Index derived from Singapore’s 2010 areal census (higher scores indicate greater disadvantage). Incident DR and VI were defined as absent at baseline but present at follow-up, while DR and VI progression were defined as a ≥1 step increase in severity category at follow-up. Modified Poisson regression analysis was used to determine the associations of PLSES and ALSES with incidence and progression of DR and VI, adjusting for relevant confounders.ResultsIn multivariable models, per SD increase in ALSES score was associated with greater DR incidence (risk ratio (95% CI) 1.27 (1.13 to 1.44)), DR progression (1.10 (1.00 to 1.20)) and VI incidence (1.10 (1.04 to 1.16)), while lower PLSES variables were associated with increased DR (low income: 1.68 (1.21 to 2.34)) and VI (low income: 1.44 (1.13 to 1.83); ≤4 room housing: 2.00 (1.57 to 2.54)) incidence.ConclusionsWe found that both PLSES and ALSES variables were independently associated with DR incidence, progression and associated vision loss in Asians. Novel intervention strategies targeted at low socioeconomic status communities to decrease rates of DR and VI are warranted.

scholarly journals Prevalence and service assessment of cataract in Tibetan areas of Sichuan Province, China: population-based study

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e031337 ◽  
Author(s):  
Danba Jiachu ◽  
Ling Jin ◽  
Feng Jiang ◽  
Li Luo ◽  
Hong Zheng ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Response Rate ◽  
Rapid Assessment ◽  
Population Based ◽  
Cross Sectional Study ◽  
Secondary Outcome ◽  
Cross Sectional ◽  
Population Based Study ◽  
Low Prevalence ◽  
Better Than

ObjectivesTo assess the prevalence of visual impairment (VI) and blindness (BL) due to cataract and cataract surgical outcomes in remote dispersed and high-altitude Tibetan areas of China.Design and settingA cross-sectional study was conducted among people aged 50 and above in Tibetan Autonomous Prefecture of Kandze (TAPK), China, in 2017. The Rapid Assessment of Avoidable Blindness protocol was followed.ParticipantsOf 5000 eligible participants, 4764 were examined (response rate 95.3%).Primary and secondary outcome measuresCataract VI was defined as lens opacity at visual acuity (VA) levels of <3/60 (Blindness (BL)), ≥3/60 and <6/60 (severe visual impairment (SVI)), ≥6/60 and <6/18 (moderate visual impairment (MVI)), ≥6/18 and <6/12 (early visual impairment (EVI)).ResultsThe estimated prevalence of cataract BL was 0.61% (95% CI 0.42 to 0.87). With best corrected VA, the estimated prevalence of SVI from cataract was 0.86% (95% CI 0.63 to 1.17); MVI was 2.39% (95% CI 2.00 to 2.87) and EVI was 5.21% (95% CI 4.61 to 5.87). Women in TAPK had a significantly higher prevalence of cataract BL (0.82%, 95% CI 0.54 to 2.15) than men (0.34%, 95% CI 0.16 to 0.70). Women had lower cataract surgical coverage (CSC) by eyes (60.8%, 95% CI 55.5 to 65.8) compared with men (70.1%; 95% CI 63.7 to 75.7). The prevalence of cataract BL was higher among Tibetan (2.28%; 95% CI 1.98 to 2.62) than Han Chinese (1.01%%; 95% CI 0.54% to 1.87%). Overall CSC by person with BL (by better eye) was 82.0% (95% CI 75.2 to 87.6). Among cataract-operated participants, 71.2% had VA equal to or better than 6/18.ConclusionsThe study detected a low prevalence of VI and BL due to cataract with high CSC in the study area compared with many other places in China. Further actions should be taken to improve cataract surgical outcome.

scholarly journals Visual impairment and dementia risk in two population‐based prospective cohorts

2020 ◽  
Vol 16 (S10) ◽  
Author(s):  
Thomas J Littlejohns ◽  
Shabina Hayat ◽  
Robert Luben ◽  
Megan Conroy ◽  
Paul J Foster ◽  
...  
Keyword(s):  
Visual Impairment ◽  
Population Based ◽  
Dementia Risk ◽  
Prospective Cohorts

Cardiovascular health and near visual impairment among older adults in the Republic of Congo: a population-based study

2020 ◽  
Author(s):  
Antoine Gbessemehlan ◽  
Catherine Helmer ◽  
Cécile Delcourt ◽  
Farid Boumediene ◽  
Bébène Ndamba-Bandzouzi ◽  
...  
Keyword(s):  
Older Adults ◽  
Visual Acuity ◽  
Visual Impairment ◽  
Cardiovascular Health ◽  
Central Africa ◽  
Population Based ◽  
Sub Saharan Africa ◽  
Logistic Regression Models ◽  
Sub Saharan

Abstract Background Visual impairment (VI) and determinants of poor cardiovascular health are very common in sub-Saharan Africa. However, we do not know whether these determinants are associated to VI among older adults in this region. This study aimed at investigating the association between the determinants of poor cardiovascular health and near VI among older adults living in Congo. Methods Participants were Congolese older adults aged ≥ 65 years included in EPIDEMCA-FU (Epidemiology of Dementia in Central Africa - Follow-up) population-based cohort. Near VI was defined as visual acuity &lt; 20/40 measured at 30 cm. Associations between determinants of poor cardiovascular health collected at baseline and near visual acuity measured at 1 st follow-up were investigated using multivariable logistic regression models. Results Among the 549 participants included, 378 (68.8% [95% Confidence Interval: 64.9%-72.7%]) had near VI. Of the determinants of poor cardiovascular health explored, we found that having high BMI ≥ 25 kg/m 2 (Odds Ratio= 2.15 [95% CI: 1.25–3.68]), diabetes (OR=2.12 [95% CI: 1.06–4.25]) and hypertension (OR=1.65 [95% CI: 1.02–2.64]) were independently associated with near VI. Conclusions Several determinants of poor cardiovascular health were associated to near VI in this population. This study suggests that promoting a good cardiovascular health could represent a target for VI prevention among older adults.

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