The easiest guide for applying eyeliner when wearing glasses is to gauge the level of thickness per the frame. For instance, if you have thick frames, go thicker with the liner, and if your frames are thinner, you guessed it, more of a thin line is ideal. While pencil eyeliner is most common, I recommend using gel eyeliner instead. Gel liners tend to have longer staying power and due to intense pigment, can show up easier on the lid with minimal effort. If you want to dress up your eyeliner look, add a little wing at the end for more drama.