[50 years of treatment of retinal tumors at the Curie Foundation].

During the past 50 years, technical changes have led to an undeniable improvement of the lesions and the percentage of cures. Systematic treatment of the orbital cavity and optic nerve is indispensable in the case of a unilateral tumour where the optic nerve has been affected. The surveillance of a unilateral tumour must continue for a long time because bilateralisation can intervene 5 or 6 years later. One must never make a double enucleation, but always attempt a conservative treatment, on the least affected eye. Cases which are very advanced in appearence can have a favourable development and provide a useful vision.