The way is so easy.Scraping potato skin and then cleaning it, you can cut into 2 cm thick each piece. Last of all, you can apply in eye, wait for about 5 minutes and then rinse thoroughly. The causes of the formation of black rim of the eye are many, such as that the diet is not normal, lack of iron. In addition, smoking drinking, gloomy mood, excessive thought or lack of sleep, endocrine system or liver ill can also make the pigmentation around in circles. The inner nutrition of potatoes can be attracted by the skin of the surrounding eyes which may stimulated the blood circulation. Thus, potatoes can help reduce dark circles.