Hi.. looks like the problem is either
1) The vertices on the very end of the eye area are not merged giving you that look. Or if its a sub-d try hitting 3.
2) If your not using sub-ds just poly you can add a extra edge line that is very close to the end of the eye and that should fix the problem once you poly smooth. adding edges close together will help smooth out areas and give you a more defined sharp edge.
Kurt
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb