Prevalence of refractive error in the United States, 1999-2004
S Vitale, L Ellwein, MF Cotch, FL Ferris… - Archives of …, 2008 - jamanetwork.com
Objective To describe the prevalence of refractive error in the United States. Methods The
1999-2004 National Health and Nutrition Examination Survey (NHANES) used an
autorefractor to obtain refractive error data on a nationally representative sample of the US
noninstitutionalized, civilian population 12 years and older. Using data from the eye with a
greater absolute spherical equivalent (SphEq) value, we defined clinically important
refractive error as follows: hyperopia, SphEq value of 3.0 diopters (D) or greater; myopia …
1999-2004 National Health and Nutrition Examination Survey (NHANES) used an
autorefractor to obtain refractive error data on a nationally representative sample of the US
noninstitutionalized, civilian population 12 years and older. Using data from the eye with a
greater absolute spherical equivalent (SphEq) value, we defined clinically important
refractive error as follows: hyperopia, SphEq value of 3.0 diopters (D) or greater; myopia …