We lost my mother after a long battle cancer about 10 years ago, because of this, my Father's fear of medical treatment is now full blown trauma. He is in his early 70s, but recently started feeling dizzy, and has partial vision loss in his left eye. He has had no drooping, and is physically able to do everything he normally can. Except he needs to rest from stomach pain, and can't drive (because he can't see).
I am really concerned about his health, but he refuses to go to urgent care (it's been ongoing since 11/6). But he is extremely religious (catholic), and believes the loss of sight with pretty colors is sent from God, so he can atone for his sins before he dies and thus avoid purgatory. I want him to get this checked before things get worse, but he is very strong willed and just repeats "I trust God".
How do I navigate this situation, with his serious medical issue and angry refusal to go to the Doctor?
We have tried appealing to his religious side, begging him, making promises if he just has it checked then he does not have to get anything treated, and trying to emotionally open up about our worry and love for him. I want to keep him healthy and safe.