The refraction unit ak 570 combines a pleasing design with superior technology and ergonomic features. The electric height adjustable, 2 instruments sliding table supports smooth eye examinations. A pivoting patient chair allows direct access for diabled patient in their wheel chairs. The ak 570 offer a variety of ergonomic standard features and options, including, but not limited to: Electric height adjustable patient chair Electric height adjustable sliding table Control panel with 15 functions Phoropter arm and projector stand Large, solidly built desk, matching the unit