Project: Research project

Project Details


Vision disorders can lead to serious consequences in children and
adolescents, including poor school performance, low self-esteem, and an
increased risk of juvenile delinquency and injury. Unfortunately, the
epidemiology of vision disorders in children is poorly characterized
despite the importance of vision loss as a public health problem. There
have been several national population-based visual acuity surveys of
non-Hispanic whites and African-Americans but only recently has a
similar survey been undertaken on the U.S. Hispanic population when the
Hispanic Health and Nutrition Examination Survey (HHANES) was conducted
in 1982-1984. Unfortunately HHANES visual acuity data have not been
published. Therefore, there is presently no published information on
the prevalence of clinically-determined visual impairment in Hispanics.
This study will: 1) estimate the prevalence and degree of impaired near
and distance visual acuity and impaired binocularity in Hispanic
children by age, gender and ethnicity, 2) compare the prevalence of
impaired distance acuity in Hispanic and non-Hispanic children,
3)estimate the number of Hispanic children residing in the United States
with impaired near and distant vision and impaired binocularity,
4)examine associations between measures of social class and vision
impairment in Hispanic children, and 5)estimate the prevalence of dual
sensory impairment (hearing and vision) in Hispanic children by age,
gender, and ethnicity. Data for this project are derived from the
(HHANES) and the National Health and Nutrition Examination Survey I
(NHANES) each of which were conducted by the National Center for Health
Statistics (NCHS). Vision measures in the HHANES were collected on
3,419 Hispanic children ages 6-17 years and included: uncorrected
binocular distance acuity, corrected (usual) monocular distance acuity,
uncorrected binocular near acuity, and a screen for amplyopia.
Comparable data on corrected (usual) monocular distance acuity for
African-Americans and non-Hispanic whites will be obtained from the
NHANES I (1971-1972). Analyses will be conducted separately for males
and females within the five racial/ethnic groups. Because of the
complex multi-stage sampling design used in the surveys, analyses will
be performed in three stages: 1) Ignoring both the sampling weights and
the design effect; 2) Incorporating only the sampling weights; and
3)Incorporating both the sampling weights and the design effect. This
project will provide a comprehensive, integrated analysis of these NCHS
studies leading to significant advances in our understanding of the
epidemiology of visual impairment in Hispanic children.
Effective start/end date4/1/983/31/01


  • National Eye Institute


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