3. Enhance

Argon lasers

Argon lasers, like CO₂ lasers, only go a short distance into tissue. They are useful in treating skin problems and some types of eye tumors. Sometimes, they are used during colonoscopies (tests to look for colon cancer) to remove polyps before they become cancer. They also can be used with light-sensitive drugs to kill cancer cells in a treatment known as photodynamic therapy (PDT).

Another way they can be used is to help stop bleeding by sealing blood vessels in patients who are getting radiation therapy for certain types of cancer. This might be needed because sometimes radiation therapy can damage the blood vessels near tumors, causing them to tear and bleed.