Lasers produce light of a single wavelength, allowing them to focus on a very small area with high precision. This concentrated light can be absorbed by specific tissues, causing them to heat up and be destroyed. In cancer treatment, different types of lasers—such as carbon dioxide (CO2) lasers, neodymium-doped yttrium aluminum garnet (Nd:YAG) lasers, and argon lasers—are used depending on the specific needs of the patient and the type of cancer.