Regarding Retinal Condition. Completely?

Four years ago my father started experiencing strange eyesight symptoms. He cannot see the things exactly they are. It is hard for him.to locate things... He cannot pour tea into cup.. when he try to focus a dark circle comes infront of his eyes and he coulldnot see anything.. he is not able to cross roads, to run vehicle, to do daily activities. We went to Gandhi Eye hospital where they said that it can only be improved by Anti Vegf injections which should be given on monthly basis. They say this condition cannot be completely cured and neither we can give him spectacles number. It is very hard for us to inject 40k injection in one eye on regular basis. No middle class man could do that.. are there any specific treatment available which can cure him completely?