Well, yes, ice cubes can just be used to treat puffy eyes. Generally speaking, eye puffiness is a type of fluid build-up, which is also known as dropsy in the tissues around your eyes. According to some experts, the skin of the eyelids is the thinnest in the body, so when your eyes suffer from puffy eyes, it will just look like swelling underneath the lids or discoloration. At this moment, you can just apply some ice cubes with a clean, soft cloth. And just put them on your eyes. After several times, it will relieve your situation. Also, cool tea bags can be used too. By the way, overconsumption of salt, allergies or infections can cause inflammation and swelling, and finally lead to puffiness on your eyes too.