They don't use their eyes to capture prey, they use their heat pits.. That's what they are there for. A rescuer I know has a juvie Ball who doesn't have ANY eyes and that snake strikes and coils live prey like no one's business. They are very capable of what they do naturally.

Do not stun, it is inhumane and can easily cause more harm to your snake than good, especially if that prey item wakes up. It's going to be very scared, very much in pain, and very disoriented. Why would you want to expose your snake to that? Dropping in a calm, curious, and unsuspecting.