Is There a Link Between His Second Shot and His Blindness?

My dad andn unfortunately, lost a lot of his vision after his second v so to speak. He completely denied any association between between the two. The doctor said they couldn't possibly be related more than one. And i was in the room when that was said. So for the past year, i have laid out all of the medical establishments, lies, broken promises and false narratives. I sent him pereviewed published medical studies, allotbums by doctor pr corey. All that stuff showed a link between his shot and his blindness. But it all fell on deaf ears until last tuesday. When he texted me a copy of his v card, complete with the lot numbers