The creation of eyelashes is one of the most complicated tasks of a human model, there are different ways to create them, but the one that I am going to explain is the method which I feel most comfortable with; in addition, to this the result can be very realistic.
Select the edges that will be used for the start point of the lower eyelashes.
Click the "Create shape from edges" button and set the "Shape type" to "Linear"
Make the shape renderable with a thickness of 0,5 with 3 sides. It is advised to use between 4 to 6 steps for distant shots and about 8 to 12 for close-ups.
Now Right-Click in the "Snap" button and check "Vertex" in the options dialog.
Use the "Refine" command to add extra vertex points to the shape. It is important to remember that the centre of the eyelash is more densely packed with hairs than the outer areas; add the vertexes accordingly.
Copy the shape 2 times and locate the copies as demonstrated in the image; The first should be place a little forward and lower than the original, the second a little farther forward and lower again