Laser is a concentrated beam of light of a certain colour, that can deliver high energy to burn or cut tissues in your eye. YAG laser creates pulse waves that can cut tissues without heat. The laser creates a popping noise but usually does not cause pain. It is a safe procedure performed in the clinic, but there is a small risk of causing unintended damage to the cornea, iris, natural lens or the intraocular lens implant. Rarely, YAG laser can cause a retinal tear. 

A proportion of people who undergo cataract surgery can later develop clouding of the back portion of the lens capsule, causing blurring of vision, haze and glare, much like symptoms caused by cataract. The cloudy capsule can be cut with the YAG laser to create a clear window and restore the vision. Some floaters may appear, which will resolve over time.