Visual Acuity, Refractive Error, Corneal Curvature, Color Vision, and Stereopsis in Children between the Ages of Three and Seven in the Locality of Chapinero in Bogota

Abstract

<em><strong>Objective</strong><em> to determine the reference values of visual acuity, refractive status, corneal curvature, stereopsis and color vision in children between the ages of three and seven in the locality of Chapinero in Bogota. <em><strong>Materials and methods</strong><em> cross-sectional descriptive observational study. The population under study consisted of schoolchildren between the ages of three and seven (200 children). Measurements included visual acuity (VA) with the Lea Symbols and HOTV tests, cycloplegic refraction, keratometry with Nidek KM-500 autokeratometer, color vision with Color Vision Testing Made Easy and stereopsis with Randot test. <em><strong>Results</strong><em> The median visual acuity in all age groups was 0.00 (20/20). One hundred percent of the children had hypermetropia (spherical equivalent for astigmats of up to 1.00 Dpt). The medium refractive error was + 0.75 in the groups of three and four-years-old, +0.50 in the groups of five and six-year-old children and +0.62 in the group of seven-year-old children. The median corneal curvature in the horizontal meridian was 42.62 and 41.50 for the vertical meridian of three and four years, 42.75 horizontal meridian and 43.75 the vertical of five and six years, and 41.50 and 42.50 at seven-years-old. All had normal color vision. The median stereopsis was twenty-five arc seconds for three and four-year-old children, twenty arc seconds for five and six-year-old children and twenty-five for the group of seven-year-old children.