This question, first of all, what is the material of your glasses frame? If it's a metal frame, you can clamp the side of the left glasses with pliers (where you just turned the corner, break a little inside, or just break the back to get one (temple). Take your time.

2. If it is a plastic frame, you can use a hair dryer to blow hot air in the corner. If it's hot, break it inside. Remember not to blow the lens.