With a savings of over $820, this vision and hearing screening bundle cannot be beat! The plusoptiX Vision Screener is an auto-refractive vision screener that screens for the 6 common eye problems in children. The Welch Allyn OAE is an otoacoustic emission hearing screener with technology that is designed to address the challenges school nurses face when screening infants, newborns, toddlers, preschool and school-age children.