First of all I really thank you all for your input, I didn't expect to have so many replies in this fairly short amount of time and you all raised good points ! I'm going to try to adress some of it without getting lost in the sauce :
I'll admit I was so focused on *how* to make blindness work within the mechanics and framework of the game I kind of neglected to ask *other* players how they'd feel about it, I'll bring it up with them for our sessioon zero.
I was completely unaware of such a mechanic, I'll check it out and discuss it with my players, see how they all feel about it (I don't want the blind PC relying too much on other PC, especially for combat, for fear it would impact the group dynamic negatively).