**4.3 Complications**

## *4.3.1 Suction break*

Sudden suction break can occur in less than 2% of cases, but did not lead to further complications as laser treatment can be started over (**Table 4**) [19]. Most important factors to prevent it are precise patient interface placement and good preoperative anesthesia. Hard headrest avoids the head from being pushed down during insertion of the patient interface and reduces the risk for suction loss.
