Vizavance Oklahoma | Childrens Eye Exam Oklahoma students screened so far during the school year Learn More Fundraisers and Events Join us for fun and support our mission and vision. See More Practice Safety this 4th of July Learn More Mason Partnership Partners in Prevention Learn More Advancing Childrens EducationThrough Better Vision. Minimize eye strain by following the 202020 Rule. of what a child learns in a normal classroom setting is through vision of school aged children have a vision problem significant enough to impact learning of juvenile delinquents have an uncorrected vision problem of children will visit an eye care professional before entering school Vizavance formerly Prevent Blindness Oklahoma was established in 1965 and is the only nonprofit organization in all 77 counties of Oklahoma dedicated to advancing childrens education through vision.