Revision of visual impairment definitions in the International Statistical Classification of Diseases

Dandona, Lalit; Dandona, Rakhi

doi:10.1186/1741-7015-4-7

Cited by 197 publications

(145 citation statements)

References 16 publications

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“…During the first year of follow-up, we assessed the degree and duration of visual impairment and how often 12 The duration of each category of BCVA was measured as follows: the BCVA at visit 1 was taken and assumed constant until the next visit and the time between the two visits was the duration of the measured BCVA.…”

Section: Assessment Of Determinants and Outcomesmentioning

confidence: 99%

Visual outcomes and ocular morbidity of patients with uveitis referred to a tertiary center during first year of follow-up

Groen

Ramdas

Hoog

et al. 2016

Eye

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Purpose To describe the visual outcomes and morbidity of newly referred uveitis patients. Methods Retrospective cohort study of 133 newly referred uveitis patients with active uveitis who required care in a tertiary center for at least 1 year. Main outcomes were best-corrected visual acuity (BCVA) at referral and 1 year after referral, duration of visual impairment, systemic medications used, as well as all complications and surgeries during the first year of follow-up. Generalized estimating equation models was used to assess prognosticators for poor BCVA. Results The mean age at onset of uveitis was 43 years. The proportion of patients with at least one eye with BCVA ≤ 0.3 decreased from 35% at referral to 26% (P = 0.45) at 1-year follow-up. The mean duration of visual impairment in the first year after referral was 4 months per affected eye. At 1-year follow-up, bilateral visual impairment was observed in 4% but at least one ocular complication developed in 66% and 30% of patients required at least one intraocular surgery. Systemic immunosuppressive treatment was required in 35% of patients and the mean number of visits to ophthalmologist was 11 per year, while 8% of patients required hospital admission. Prognosticators for poor visual outcome included surgery undergone before referral (odds ratio (OR), 3; 95% CI, 1-11; P = 0.047), visual impairment at referral (OR, 21; 95% CI, Po0.001), and glaucoma before referral (OR, 7; 95% CI, 2-28; P = 0.007). Conclusions Patients with severe uveitis had a favorable BCVA 1 year after referral with only 4% of patients having bilateral visual impairment. This, in contrast to the prolonged duration of visual impairment during the first year of follow-up and the demanding care.

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Section: Assessment Of Determinants and Outcomesmentioning

confidence: 99%

Visual outcomes and ocular morbidity of patients with uveitis referred to a tertiary center during first year of follow-up

Groen

Ramdas

Hoog

et al. 2016

Eye

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“…Visual acuity levels of < 20/400 or < 20/200 in the better eye have been commonly used to define blindness. Visual impairment is defined as visual acuity of 20/60 or less in the better acuity eye (Dandona and Dandona 2006).…”

Section: Definition Of Blindness and Visual Impairmentmentioning

confidence: 99%

Visual impairment and blindness: an overview of prevalence and causes in Brazil

Salomão

Mitsuhiro

Belfort

2009

An. Acad. Bras. Ciênc.

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Our purpose is to provide a summary overview of blindness and visual impairment on the context of recent Brazilian ocular epidemiologic studies. Synthesis of data from two cross-sectional population-based studies -the São Paulo Eye Study and the Refractive Error in School Children Study is presented. 3678 older adults and 2441 school children were examined between July 2004 and December 2005. Prevalence of blindness in older adults using presenting visual acuity was 1.51% decreasing to 1.07% with refractive correction. The most common causes of blindness in older adults were retinal disorders, followed by cataract and glaucoma. In school children, the prevalence of uncorrected visual impairment was 4.82% decreasing to 0.41% with refractive correction. The most common cause of visual impairment in school children was uncorrected refractive error. Visual impairment and blindness in Brazil is an important public health problem. It is a significant problem in older Brazilians, reinforcing the need to implement prevention of blindness programs for elderly people with emphasis on those without schooling. In school-children cost-effective strategies are needed to address a readily treatable cause of vision impairment -prescription and provision of glasses.

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“…Visual Acuity was measured for each eye with E Snellen adapted chart at 3 meters and results were classified according to WHO definition [19], considering blindness as presenting visual acuity < 20/400 (0.05) in the better eye and low vision as presenting visual acuity < 20/60 (0.33) but ≥ 20/400 (0.05) in the better eye.…”

Section: Methodsmentioning

confidence: 99%

Ocular Findings in a Brazilian Rural Slave-Descendant Community: Eye Health in Quilombos

Oliveira¹,

Leitão²,

Carvalho³

et al. 2016

Int Arch Med

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Purpose: To report ophthalmological findings from one quilombo remnant population, a Brazilian marginalized rural and slave-descendant community.Methods: Descriptive study of eye health from one of the largest quilombo communities in Brazil, located in Conceição das Crioulas, Pernambuco. Ophthalmic exam including visual acuity, refractive examination, biomicroscopy, fundus examination, tonometry and pachymetry was performed in a convenience sample of 255 residents over 40 years-old, representing approximately one third of the population in this age range.Results: Half of the subjects had never been examined by an ophthalmologist in their lives. Blindness was identified in 6.7% of participants and low vision in 8.6%. Visual impairment was caused mainly by cataract and uncorrected refractive errors. Cataract was found in 27.3% of subjects. Ametropia was documented in 71% of participants and the most prevalent refraction error was hyperopia. Prevalence of glaucoma and age-related macular degeneration were respectively 5.4% and 1.9%. Pterygium was detected in 26.7% of participants. Correcting lenses were prescribed to 57.4% of individuals, 5.5% were referred for surgery, 2.7% to specialized clinics and 1.2% to additional tests. Conclusions:Blindness, cataract and pterygium were highly frequent in quilombo residents, and distribution of other ocular diseases were close to average published rates. Data collected may help planning preventive and promotive actions for eye health of socioeconomic disadvantaged quilombo populations.

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Revision of visual impairment definitions in the International Statistical Classification of Diseases

Cited by 197 publications

References 16 publications

Visual outcomes and ocular morbidity of patients with uveitis referred to a tertiary center during first year of follow-up

Visual outcomes and ocular morbidity of patients with uveitis referred to a tertiary center during first year of follow-up

Visual impairment and blindness: an overview of prevalence and causes in Brazil

Ocular Findings in a Brazilian Rural Slave-Descendant Community: Eye Health in Quilombos

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