Instant Eye Serum Why on the end? It's very simple, when you are sleeping the oil spread equally on your eyelashes. So your eyes will not receive a big amount of oil. You should remember it's for the eyelashes and not for the eyes! Same way as you use eyes products, you not using the eye-serum or eye-cream very close to the eye area. You should gently apply eye-serum around the eye area and under the brow.