the sky is the limit, my mono-lidded friend! I suggest you check out style.com and search for Asian models backstage at shows. you’ll notice that, in fact, 99% of Asian models (Shu Pei! Liu Wen! Hyoni Kang! Tao Okamoto!) do not have folds and look as gloriously gorgeous in their makeup as their fold-y fellow models.
and this just in: makeup artist Beau Nelson told me on twitter that he likes working on Asian girls because “without the restriction of a fold I can put eyeshadow wherever I want, as big as I want.” sounds good to me!