Prevalence and selected characteristics of childhood vision impairment

Cynthia A Mervis1, Coleen A Boyle, Marshalyn Yeargin-Allsopp

  • 1National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA. cmervis@cdc.gov

Insights

Vision impairment affects 10.7 per 10,000 children in Atlanta, with many experiencing low vision or coexisting disabilities. This highlights the need for comprehensive, multidisciplinary services for affected children.

Area of Science:

  • Pediatric Ophthalmology
  • Public Health
  • Epidemiology

Background:

  • Vision impairment is a significant concern in childhood.
  • Understanding its prevalence and characteristics is crucial for effective intervention.

Purpose of the Study:

  • To describe the epidemiology of vision impairment in children aged 6-10 years in metropolitan Atlanta.
  • To identify demographic characteristics, prevalence rates, and associated conditions.

Main Methods:

  • Retrospective analysis of data from the Metropolitan Atlanta Developmental Disabilities Surveillance Program.
  • Inclusion of children aged 6-10 years with best corrected visual acuity of 20/70 or worse in the better eye.

Main Results:

  • Overall prevalence of vision impairment was 10.7 per 10,000 children.
  • 59% had low vision; nearly two-thirds had coexisting disabilities.
  • Educational programs varied based on impairment severity and coexisting conditions.

Conclusions:

  • Coexisting disabilities are common in children with vision impairment, underscoring the need for multidisciplinary services.
  • Accurate prevalence rates require diverse case ascertainment sources beyond vision impairment classes.

Related Concept Videos

Vision01:24

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category, whereas...
Prevalence and Incidence01:08

Prevalence and Incidence

In statistical epidemiology and health sciences, two essential metrics—prevalence and incidence—are fundamental for understanding disease dynamics within a population. These measures enable public health officials, epidemiologists, and researchers to assess the burden of diseases, allocate resources effectively, and design impactful public health policies and interventions.
Prevalence indicates the proportion of individuals in a population who have a specific disease or health condition at a...
Diabetic Retinopathy01:27

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...