 Contact lenses can be used to deliver drugs to treat various ophthalmic diseases. These lenses can be made from different materials and contain different types of drugs. The most common method involves embedding or coating the drug onto the surface of the lens. Other methods include using colloidal nanoparticles, vitamin E modification, polymers, ion ligands, supercritical fluids, and more. Each method has its own benefits and drawbacks, but all have shown promise in treating ophthalmic diseases. This article was authored by Liang Huijiao, Jikesong, Yongle Du, and others.