The best and easy way to remove the dark circle permanently from the eyes skin without using any cosmetic products is by using a herb called inknut(harro in nepali).
Take the following procedure:
1) Take a stone board to rub the herb.
2) Put a few drops of water on it.
3) Rub the inknut against the board.
4) A paste will be formed. Use your ring finger and apply the paste around your eyes.
5) Leave it to dry (15-20 minutes).
6) Wash it off using running tap water.
7) Atleast for 7 days, apply this paste regularly at night before sleeping.