I don't know, how much money is a large amount of money? Anyway, buy him some spa passes so he can go get a nice massage whenever the mood hits him.

Maybe an Alexa device and some smart home stuff? You could help him set it up, and it’s low tech from there. I love being able to set my thermostat by voice for instance. Or a tv with a voice remote so he can play what he likes? Or a Netflix subscription? They have loads of movies and tv shows with audio description which describes what’s going on for blind viewers

if you truly want something that can help him with his visual impairment. Please google American Association for the blind!

I am in Canada so we have CNIB which has a ton of accessible games, cooking tools, how to activities, woodworking, gardening, sewing, sports, and literally 1000 other things that could be interesting.

Like I’ve seen mentioned here quite a bit, it’s not gifts for the blind, it’s gifts of interest for people who happen to be visually impaired. Finding out something more personal like hobbies, interests, or something he wants to get into or wishes he could do but can’t with the tools he has now would be best

The first question you need to ask is what does your dad generally enjoy? Does he have hobbies like homebuilding, reading, etc.? Once you find out what sort of stuff he likes, do some research and see if there are either adaptions/assistive technology/blind friendly options if necessary. For instance, if he loves to read, maybe you buy him an audible membership or an E reader… Don’t know what your budget is, but U get the point.

My hubby really wants some accessible home gadgets. Maybe your dad would like something like that too?

I think cash would be the best option as he'd then be able to buy what he likes.

How much is a "huge sum of money?"

What's your budget?

I think it is worth considering what you would buy him if he were sighted and work from there.

My sighted dad always appreciates toiletries and fancy coffee