Outer corner of my eye is split?

A long time ago I had something hit my eye and the outer corner (closest to my ear) split. Now it looks like a V. The same thing happened to my other eye. I doesn't hurt but when I blink the moisture goes in the split. Never a problem, until I started wearing makeup. I can't put any eye liner near it because it leaks off. I've tried every type of eye liner. Is this normal for my eyes to have a corner split? How can I fix it?