1. Upload your character in the scene. If you want to quickly try out

multiple eyelashes, you might want to link your character model to

all collections by pressing Shift+M.

2. Use Empty to move the eyelashes and place them to the eyesocket

of your character. (It's best not to rotate the Empty).

3. To correct the shape of the eyelashes, select the Controller

curve, go to the edit mode, and by moving vertices adjust the curve,

so that it repeated the shape of your character’s eyelids. By

selecting the vertices and pressing Ctrl+T you can tilt the

eyelashes. You can also tilt the vertices manually, achieving even

greater control over the shape. By pressing Alt+S you can adjust

the length of the eyelashes.

4. You can also move and scale the eyebrows to further

adjust them to fit your character.

5. In edit mode, you can change the thickness of the eyelashes by

pressing Alt+S.