I appreciate the responses and the shared knowledge.
I apologize if my description of the situation was unclear. I'm not concerned for the vision or ears of anyone on the receiving end of a defensive shot. I was asking if the combination of noise and flash from discharging a 12 gauge shotgun...
I've been researching home protection options and I've read that shooting a 12 gauge shotgun in a dark enclosed space (like my living room at night) is equal to setting off a flash bang grenade and can disable the defender so they cannot take an accurate follow-up shot, if needed.
I've looked...