Many people wear eye glasses or contacts. One challenge they may face is trying to shoot a self-defense gun after being awakened in the middle of the night. Can you identify the threat? Can you see the gun's sights?
A homeowner confronts an intruder inside his house. The situation isn't clear. Is this a criminal break-in, or just a mistake? Having a light and laser on the pistol, and knowing how to use them, might save a life.