Mostly these decals are printed 'centred'. So some fiddling around to get an eye ball looking left or right will be involved.
Plus, I could never work out what to with the excess, as the eyes are printed perfectly round, IRL they are naturally framed by the eye lids. So what to do with the excess carrier film around the edges?
Pre trim, post trim, bit of both, paint over the excess, hope like hell it doesn't wrinkle during application.......
not quite sure if the energy invested equals the reward.....
just my thoughts.....
Cheers