You cannot "fix" this man. And, it's unsafe to think you can motivate him to get help. Unless, and until he gets caught breaking a law, it's unlikely that there will be any type of intervention that alters his behaviorl. And, then, whatever it is, it won't be about making him a better husband.
There's too much "love him or leave him" crap out there. Don't feel guilty for staying. You need to focus on survival; personal, health, and financial survival. If you are in physical danger, that is very serious. And, you do need to get away.
Unfortuantely too many women feel trapped into thinking they have to "fix" him or leave. Live one day at a time and always, always, think defensively. Start squirreling away small sums of money. Look into where you might go if you did leave. Look into programs for people with low vision. Sometimes, you can get job training. Gather information. For everything that seems like a dead end, another door will open. You don't have to act on your information. Just having it will make you feel less helpless. It's the unkowns that make us fearful. And being uninformed makes us trapped and ill prepared. Prepare yourself. If you feel you can't get out, that's OK. But, just in case someday you think you can, you'll be prepared.
Also, spend some time reading up on bi polar disorder. Especially, moodswings, mixed states, and hypersexuality. It's possible that there's an underlying exhaustion in his rageful mainia. Then, read about narcissism and abusive men. He's 51 years old. It will take 51 years to rebuild him. Whereas, all you need is a little remodeling.
Good Luck