Here we go...
Did you give it a try? How'd it work for you?
I know some people gently pull the outer corner area of their eye with their ring finger (which is the weakest finger so generally the best to use around your eyes) to flatten/straighten the skin out a bit when lining, just make sure you're gentle!
It may take some practice, but once you do it enough times you'll be able to do it in your sleep ;)