... hereditary form of RB (40% of cases) is mostly bilat-eral and those patients are treated with enucleation and/ or external beam radiotherapy (EBRT), and/ or thermo-chemotherapy. Patients with unilateral ... (thermo-chemotherapy, laser photocoagulation, plaque therapy and cryotherapy)[5]. Visual acuity was defined as visualacuity after subjective refraction in the survivor's best eye, and was categorized according ... University Medical Center, Amsterdam, the Netherlands, 4Emma Children's Hospital, Academic Medical Center, Amsterdam, the Netherlands and 5Department of Clinical Epidemiology and Biostatistics,...