Knee arthroscopy surgery is performed by making small (1-2 cm) incisions in the front of the knee, filling the knee joint and continuously flushing it with sterile fluid to allow a small camera to be inserted to view the inside of the knee. A variety of specialized tools are then placed into the knee joint to address any cartilage, meniscus or ligament injuries. Knee arthroscopy is in contrast to open knee surgery, where a larger incision is made in the skin and joint capsule (thick fibrous tissue surrounding the joint) in order to access the joint. Smaller incisions and less dissection of the joint capsule allows for quicker recovery and generally less pain after surgery. Today, knee arthroscopy is the most common surgery to treat non-arthritic conditions.