The so-called pupil liner is a tattooed eyeliner, the principle is the same as tattooing eyebrows, with the aid of anesthetic drugs, using a professional eyeliner tool, dip in black, dark blue, brown liquid, in the eyeliner area for tattooing, forming a long-standing eyeliner, can also be called the pupil liner, this line will slowly become lighter over time. The pupil line is near the eyelash root of the eyelid, the upper eyelash is on the outside of the eyelash root, the lower eyelash is on the inside of the eyelash root and between the gray line of the lid margin. Young women have a fast metabolism and may last about one year, while middle-aged and older women have a longer period of time, up to three years for some people. If you want to achieve longer-lasting results after having your pupils threaded, care methods are more important. For example, you can apply a repair cream to promote healing, and you should not tear the scab by hand, but wait for it to fall off naturally. As a rule, do not apply eye makeup for 1 month, and avoid rubbing to avoid affecting the effect of the coloring product when removing makeup. It is also a very good idea to touch up the color of your contacts after they have faded. Although having your contacts done can enhance the beauty of your eyes, it is actually an invasive operation and can be followed by edema and pain, and there may be certain complications. If there is local swelling and pain, ice packs can be applied to relieve it. Try to keep the wound out of water for 1 week to avoid infection. If dry eyes are unbearable and not relieved, dry eyes may appear, and timely medical treatment is needed at this time.