Unilateral abducens palsy with maximal abduction up to primary position should be treated by muscle transposition. With squint angles (far distance) < +20 degrees a classical Hummelsheim transposition is recommended, with squint angles > +20 degrees the Kaufmann's modification should be preferred. If abduction beyond primary position is possible, lateral rectus resection suffices. With squint angles > +12 degrees additional recession of the ipsilateral medial rectus muscle becomes necessary.