Firstly, you need to tell me that where your eyeglasses are broken.If it is caused by losing screws, you can tighten the eyeglasses frames with screws. However, if it caused by broken of the plastic frame such as arm or nose bridges, it is very difficult to fix them. Maybe you can fix them with adhesive tape by warp the broken part. It looks ugly if you do that. If so, you'd better buy a new pair. And you can expected to get some cheap but good quality eyeglasses from online shop.