Im sorry to hear about the lasting side effects from your eye surgery, that must be incredibly frustrating.
night vision does seem to be a really rare optional extra on high end luxury cars from everything I've read. Looks like Audi Mercedes and BMWs have offered it on their larger models only which doesn't fit your bill.
How are you expecting the night vision to help you, is it more from a confidence, and increased time to react lens if there's an obstruction ahead ? It won't necessarily help you see further or more clearly from what I've read and uses infrared tech to create an image based on heat signatures. It doesn't sound like it would help with seeing road layout and road signs etc more clearly in the dark.
I wonder if it's worth test driving say a secondhand audi or bmw later in the year that has this option already speccd to see how much it benefits you before you invest.
There do seem to be some aftermarket options to have this fitted independently to any vehicle and that might be worth investigating further.
Are there other car specifications that also may help you that are more common? I'm thinking automatic high beams, adaptive headlights, semi autonomous driving aids such as predictive adaptive cruise control/trsvel assist, collision avoidance systems etc. Apologies if you already have these on your current car already!