Nowadays laser is extensively used in various industrial, communicative, medical, and other fields. Using laser in medicine has enabled physicians to perform the most accurate and finest operations within few minutes. Non-observance of safety points during laser performance could be seriously harmful for the medical staff and the patient. Therefore, in order to prevent the possible damage of this electromagnetic energy, some international standard points are advised. In this paper, a brief review of laser itself, the vulnerable parts during laser operation, maximum allowable radiation and etc are presented. We hope to help the physicians in offering medical services as safe as possible.