The Retinoblastoma stage 111 is treated by
Stage 111 is extraocular extension.(that is tumor has spread to the orbit) and is thus treated by exenteration(all the orbital contents along with the periosteum of the bone is removed. Refer khurana 6/e
Enucleation
Exenteration
Radiotherapy
None
Diseases of orbit, Lids and lacrimal apparatus