The Healthy People 2020 evidence-based resources identified have been selected by subject matter experts at the U.S. Department of Health and Human Resources. Each of the selected evidence-based resources has been rated and classified according to a set of selection criteria based, in part, on publication status, publication type, and number of studies. This classification scheme does not necessarily consider all dimensions of quality, such as statistical significance, effect size (e.g., magnitude of effect), meaningfulness of effect, additional effect over control, and study design (e.g., sample size, power, internal validity, external validity, generalizability, potential biases, potential confounders).
Clinical Recommendations
The following clinical recommendations come from the US Preventive Services Task Force (USPSTF) 
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Screening for Visual Impairment in Children Ages 1 to 5 Years
The U.S. Preventive Services Task Force (USPSTF) recommends vision screening for all children at least once between the ages of 3 and 5 years, to detect the presence of amblyopia or its risk factors.
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Consumer Information
The following consumer resources are from the Quick Guide to Healthy Living at healthfinder.gov.
Your vision changes as you get older. Learn the signs and symptoms of eye problems.
Get your child’s vision checked by age 5, even if there are no signs of eye problems.
You can lower your risk of type 2 diabetes by eating healthy and staying active.
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