In a small clinical study the author evaluates the efficiency of the hemi-hangback recession (retroposition) procedure. This surgical procedure, which weakens extraocular muscles, proceeds from the hangback recession (retroposition) technique (hanging the muscle on a resorbable suture), which combines with the traditional recession. Hemi-hangback recession procedure is suitable in cases when a recession of more than 7 mm is needed. It is experimentally and clinically as well demonstrated in extra large recessions, that a shift towards the original insertion of the muscle occurs. The combination of the classical and hangback recession has its advantages in specific indications. More convenient surgical access and a reduction of the objectionable shift of the muscle backwards are main advantages of this procedure. The surgical procedure is described in this article and results in the group of patients from the Children’s and Adult’s Department of Ophthalmology at the Faculty Hospital in Motol, Prague, Czech republic. The hemi-hang-back muscles recession is indicated in third and sixth nerve palsies, restrictive forms of strabismus and complicated or successive forms of strabismus.

        Key words: hemi-hangback recession, hangback recession, extraocular muscle, weakening procedure, migration of the muscle