Dataset Information

The Prevalence and Demographic Associations of Presenting Near-Vision Impairment Among Adults Living in the United States.

ABSTRACT: PURPOSE:To estimate prevalence of presenting near-vision impairment (PNVI) among people aged ?50 years in the United States (US) and examine associations with sociodemographic characteristics. DESIGN:Cross-sectional study. METHODS:A total of 11 016 of 12 781 (88.5%) US adults aged ?50 years participated in the National Health and Nutrition Examination Survey (NHANES) between 1999 and 2008 with recorded near visual acuity. PNVI was defined as presenting near vision worse than 20/40; functional near-vision impairment (FNVI) was defined as at least "moderate difficulty" with either reading newsprint or near work. Prevalence of PNVI and FNVI were estimated accounting for National Health and Nutrition Examination Survey multistage probability sampling design. Multivariable regression models were used to determine sociodemographic characteristics associated with PNVI. RESULTS:A total of 13.6% of participants had PNVI, with 25.9% reporting concurrent FNVI. Higher odds of PNVI was associated with nonwhite race, older age, male sex, less than high school education, lack of private health insurance, income less than poverty level, lacking/not using near-vision correction at time of examination, and impaired distance vision. Although the majority of participants with PNVI (82.9%) had normal distance vision or uncorrected refractive error, less than half (46.1%) used near-vision correction. Not using near correction was associated with nonwhite race, younger age, male sex, and lack of access to health care. CONCLUSIONS:Approximately 1 in 8 Americans aged ?50 years have PNVI, with 1 in 4 reporting concurrent FNVI. Demographic factors shown to be important in access to eye care likely influence PNVI and utilization of near-vision correction in the US. As the majority of PNVI is likely correctable with spectacles, allocation of resources to provide corrective lenses to those in need likely has great public health implications.

SUBMITTER: Zebardast N

PROVIDER: S-EPMC5253305 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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The Prevalence and Demographic Associations of Presenting Near-Vision Impairment Among Adults Living in the United States.

Zebardast Nazlee N Friedman David S DS Vitale Susan S

American journal of ophthalmology 20161116

<h4>Purpose</h4>To estimate prevalence of presenting near-vision impairment (PNVI) among people aged ≥50 years in the United States (US) and examine associations with sociodemographic characteristics.<h4>Design</h4>Cross-sectional study.<h4>Methods</h4>A total of 11 016 of 12 781 (88.5%) US adults aged ≥50 years participated in the National Health and Nutrition Examination Survey (NHANES) between 1999 and 2008 with recorded near visual acuity. PNVI was defined as presenting near vision worse tha ...[more]

PMID: 27865728

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Project description:PurposeTo investigate the progression of near vision loss and the cumulative incidence of near vision impairment (NVI) 6 years after initial examination of an urban Chinese cohort.DesignPopulation-based, prospective cohort study.ParticipantsPeople aged ≥35 years examined at baseline in the Yuexiu District of Guangzhou, China.MethodsParticipants examined at baseline were invited for 2-year and 6-year follow-up examinations in 2010 and 2014, respectively. Examinations included noncycloplegic autorefraction and binocular near visual acuity (NVA) with and without current near correction measured at 40 cm using a LogMAR ETDRS near vision tumbling E chart. Those with uncorrected binocular NVA (UCNVA) ≤20/40 underwent subjective refraction to obtain best-corrected binocular NVA (BCNVA).Main outcome measuresChange in UCNVA between baseline and 2014 follow-up examinations and the 6-year cumulative incidence of vision impairment based on 3 definitions: NVA ≤20/40, ≤20/50, and ≤20/63.ResultsAmong the 1817 baseline participants, 1595 (87.8%) were reexamined in 2010 and 1427 (78.5%) in 2014. Mean vision loss between baseline and the 2014 follow-up was 1.54 (±1.74) lines of UCNVA. Vision loss was associated with age 80 years or older, less education, and better baseline UCNVA. The 6-year cumulative incidence of uncorrected binocular NVI (UCNVI) across the 3 vision impairment definitions was 55.2% (95% confidence interval [CI], 46.1%-64.3%), 51.3% (95% CI, 44.0%-58.7%), and 42.4% (95% CI, 35.5%-49.3%), respectively. With best-corrected binocular NVI (BCNVI), incidence was 6.89% (95% CI, 4.28%-9.50%), 5.17% (95% CI, 2.89%-7.44%), and 2.62% (95% CI, 1.11%-4.12%), respectively. A higher incidence of UCNVI was associated with worse baseline UCNVA for all 3 impairment definitions. Similarly, incidence of BCNVI was associated with worse baseline BCNVA, but also with older age and education at the primary level or less. Gender was not significant for either UCNVI or BCNVI.ConclusionsApproximately half of those aged 35 years or older develop UCNVI in 6 years, the overwhelming majority of whom can be corrected with spectacles. Cost-effective strategies to provide spectacles to this at-risk population remains an issue requiring further study.

Project description:ImportanceVisual impairment (VI) in early childhood can significantly impair development.ObjectiveTo determine demographic and geographic variations in VI in children aged 3 to 5 years in the United States in 2015 and to estimate projected prevalence through 2060.Design, setting, and participantsDescriptive study reporting statistics estimated based on prevalence data from 2 major population-based studies conducted in the United States between 2003 and 2011. Using US census projections, prevalence of VI and cause-specific VI in the better eye were reported by race/ethnicity, state and region, and per capita prevalence of VI by state. The study included preschool children in the United States. Analyses for this study were conducted between February 2016 and March 2017.Main outcomes and measuresPrevalence of VI among children aged 3 to 5 years in the United States.ResultsIn 2015, more than 174 000 children aged 3 to 5 years in the United States were visually impaired. Almost 121 000 of these cases (69%) arose from simple uncorrected refractive error, and 43 000 (25%) from bilateral amblyopia. By 2060, the number of children aged 3 to 5 years with VI is projected to increase by 26%. In 2015, Hispanic white children accounted for the highest number of VI cases (66 000); this group will remain the most affected through 2060, with an increasingly large proportion of cases (37.7% in 2015 and 43.6% in 2060). The racial/ethnic group with the second most VI is projected to shift from non-Hispanic white children (26.3% in 2015 decreasing to 16.5% in 2060) to African American children (24.5% in 2015 and 22.0% in 2060). From 2015 to 2060, the states projected to have the most children with VI are California (26 600 in 2015 and 38 000 in 2060), Texas (21 500 in 2015 and 29 100 in 2060), and Florida (10 900 in 2015 and 13 900 in 2060).Conclusions and relevanceThese data suggest that the number of preschool children with VI is projected to increase disproportionally, especially among minority populations. Vision screening for refractive error and related eye diseases may prevent a high proportion of preschool children from experiencing unnecessary VI and associated developmental delays.

Project description:The number of individuals with visual impairment (VI) and blindness is increasing in the United States and around the globe as a result of shifting demographics and aging populations. Tracking the number and characteristics of individuals with VI and blindness is especially important given the negative effect of these conditions on physical and mental health.To determine the demographic and geographic variations in VI and blindness in adults in the US population in 2015 and to estimate the projected prevalence through 2050.In this population-based, cross-sectional study, data were pooled from adults 40 years and older from 6 major population-based studies on VI and blindness in the United States. Prevalence of VI and blindness were reported by age, sex, race/ethnicity, and per capita prevalence by state using the US Census projections (January 1, 2015, through December 31, 2050).Prevalence of VI and blindness.In 2015, a total of 1.02 million people were blind, and approximately 3.22 million people in the United States had VI (best-corrected visual acuity in the better-seeing eye), whereas up to 8.2 million people had VI due to uncorrected refractive error. By 2050, the numbers of these conditions are projected to double to approximately 2.01 million people with blindness, 6.95 million people with VI, and 16.4 million with VI due to uncorrected refractive error. The highest numbers of these conditions in 2015 were among non-Hispanic white individuals (2.28 million), women (1.84 million), and older adults (1.61 million), and these groups will remain the most affected through 2050. However, African American individuals experience the highest prevalence of visual impairment and blindness. By 2050, the highest prevalence of VI among minorities will shift from African American individuals (15.2% in 2015 to 16.3% in 2050) to Hispanic individuals (9.9% in 2015 to 20.3% in 2050). From 2015 to 2050, the states projected to have the highest per capita prevalence of VI are Florida (2.56% in 2015 to 3.98% in 2050) and Hawaii (2.35% in 2015 and 3.93% in 2050), and the states projected to have the highest projected per capita prevalence of blindness are Mississippi (0.83% in 2015 to 1.25% in 2050) and Louisiana (0.79% in 2015 to 1.20% in 2050).These data suggest that vision screening for refractive error and early eye disease may reduce or prevent a high proportion of individuals from experiencing unnecessary vision loss and blindness, decrease associated costs to the US economy for medical services and lost productivity, and contribute to better quality of life. Targeted education and screening programs for non-Hispanic white women and minorities should become increasingly important because of the projected growth of these populations and their relative contribution to the overall numbers of these conditions.

Dataset Information

The Prevalence and Demographic Associations of Presenting Near-Vision Impairment Among Adults Living in the United States.

Publications

The Prevalence and Demographic Associations of Presenting Near-Vision Impairment Among Adults Living in the United States.

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