I don't know... I think it would work for that, Promise Phan (dope2111) on youtube used liquid latex to put on her elf ears in some tutorials, which eyelash glue is just liquid latex thats safe(er) for the eye area... but it might not hold that long...
Next Con & Cosplays: Otakuthon as
Mami Tomoe from Pulla Magi Madoka Magica
Riza Hawkeye from FullMetal Alchemist Brotherhood
Battler Ushiromiya from Umineko no Naku Koro Ni