Safety eyes are specifically made for knitted, crocheted or fabric toys, usually made of plastic and come in a variety of sizes, shapes, colors and styles. They are easy to attach but difficult to remove. Safety eyes are attached before you stuff and close your amigurumi, and have a little washer that holds the eyes in place. If you don’t want to use safety eyes, simply embroider them on instead.
Here you can watch a video on how to use safety eyes(click on the link): https://youtu.be/FXgFHEa_TYo