Yukari will be okay, she has a bunch of spare eyes just floating around...
... Unless Yuuka poked those out, too. :\
Heaaaaaaah!! My Eyeeeeees!! My Eyeeeeees!!Fufu... What kind of expression will Reimu make....Oh, looks like you're having fun, Yuka.Wait for me, Reimu.This time, I'll make sure my feelings reach you.