The term 'USED A LIGHT BEAM ON IN SURGERY' can be summarized by the solution 'LASED, ' which is an acronym for 'Laser-Assisted Surgery.' Laser-Assisted Surgery is a type of minimally invasive surgery that uses a laser beam to make precise incisions in tissue. This type of surgery is often used to treat conditions such as cataracts, glaucoma, and retinal detachment. It is also used to remove tumors and perform cosmetic procedures. Laser-Assisted Surgery is a safe and effective way to perform surgery with minimal risk of complications.