The primary difference between eye gels, serums, and creams is the labeling of production. Given that the beauty products and cosmetics category has more flexible labeling requirements, it is up to the company to decide how to categorize their product. That said, most gels are clear and are designed to hydrate your skin. Some gels also have cooling properties to energize tired eyes. Serums are often bulky and are usually sold as more scientific. Eye creams are lotion-like and cover the most extensive application cases of the range.