Line the outer half of your top lids, keeping the line very thin towards the inside, and slightly thicker on the outer part, maybe winging it out if appropriate. Don't have a thick line in the middle of your eye. Don't concentrate your eyeshadow colors in that area either; you will probably be best using a darker color towards the outer part of your eye, blending it outwards and up as well. You can also build your mascara on your outer lashes so that they appear longer and draw those edges out more.