The precautions for making perfect pupil line include paying attention to local hygiene, avoiding water and making up the color on time. 1. Pay attention to local hygiene: after making perfect pupil line, if there is discomfort in the eyes, you should avoid wiping directly with your hands, pay attention to local hygiene, use sterile cotton swabs dipped in sterile saline to clean, so as to avoid infection. 2. Avoid water: after making pupil line, avoid washing face, swimming, strenuous exercise and taking part in sauna and other activities that are easy to contact with water within 7 days, which may cause infection of the surgical site or cause the pupil line to fall off and decolorize. 3. On time to make up the color: the best time to make up the color of the pupil line for the second time is usually about a month, which is conducive to the color of the pupil line to return to the natural and coordinated, to enhance the beauty of the eyes and face. The precautions for pupil line have the above points, the diet should also pay attention to control, can not eat spicy food and too greasy food, do not drink alcohol.