Nevus of Ota, also known as palpebral nevus, is a common pigmentary disorder characterized by cyanotic brown spots around the eyes. About half of the patients are found to have the disease at birth, but some of them start to appear in childhood, and some of them only gradually appear in adolescence, showing black, brown and blue patches. Some patients are stable for a long time when they reach childhood, and most experts believe that it will be more stable only after puberty, but some people still have the tendency to grow slowly until they are about 30 years old. In 2010, we introduced a new generation of imported laser machine with more powerful and better treatment parameters to provide better service to patients.