The Optec Series Vision Screeners perform comprehensive visual screening in minimal time. The Optec allows you to screen far and near visual acuity, muscle imbalance, vertical and lateral phoria and color vision all in one compact machine. Tests at 20 feet for FAR and 14 inches for NEAR vision yet requires very little space. Features LED lighting with 100,000+ hours of use. The Optec Series vision screener is most similar to the old Titmus OV-7 unit.