This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
A 5 year old boy presented with leukocoria in right eyeball diagnosed to be retinoblastoma involving full eyeball, while other eye had 2–3 small lesions in the periphery. What will be the ideal management for this patient ? 
Select and explain. 
A. Enucleation of both eyes, B. Enucleation of right eye & conservative management of the other eye, C. Enucleation of right eye and focal therapy of the other eye, D. 6 cycles of chemotherapy
C: Enucleation of right eye and focal therapy of the other eye
Answer: C: Enucleation of right eye and focal therapy of the other eye 
Explanation: When vision cannot be saved in both the eye :-
Enucleation of more affected one.
Chemotherapy + local destruction for less affected eye.