Retrobulbar injection is given in -

It is given in the central space Central space : also called, muscular cone or retrobulbar space. It is bounded anteriorly by the Tenon's capsule lining back of the eyeball and peripherally by the four recti muscles and their intermuscular septa in the anterior pa. In the posterior pa, it becomes continuous with the peripheral space. Tumors lying here produces axial proptosis. Ref:AK Khurana 6thE pg 403